diff --git a/.gitignore b/.gitignore
index bb38f85..ad1deb9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 /target
 *.iml
-/.idea
\ No newline at end of file
+/.idea
+
+nl.txt
\ No newline at end of file
diff --git a/Cargo.lock b/Cargo.lock
index 98bb894..9506d07 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,12 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "anyhow"
+version = "1.0.67"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7724808837b77f4b4de9d283820f9d98bcf496d5692934b857a2399d31ff22e6"
+
 [[package]]
 name = "more-asserts"
 version = "0.2.2"
@@ -12,6 +18,7 @@ checksum = "7843ec2de400bcbc6a6328c958dc38e5359da6e93e72e37bc5246bf1ae776389"
 name = "rltk"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
  "more-asserts",
  "unicode-segmentation",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index bb580aa..a52d734 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,7 +4,13 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-unicode-segmentation = "1.9.0"
+unicode-segmentation = "1"
+anyhow = "1"
+#regex = "1"
 
 [dev-dependencies]
-more-asserts = "0.2.2"
\ No newline at end of file
+more-asserts = "0.2.2"
+
+[[bin]]
+name = "count"
+path = "src/bin/count.rs"
diff --git a/src/bin/count.rs b/src/bin/count.rs
index e69de29..1392404 100644
--- a/src/bin/count.rs
+++ b/src/bin/count.rs
@@ -0,0 +1,3 @@
+fn main(){
+    rltk::pipelines::count();
+}
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
index 623b242..b9b99af 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,8 @@
 pub mod lm;
 pub mod util;
 pub mod metrics;
+pub mod mat;
+pub mod pipelines;
+
 #[cfg(test)]
-pub(crate) mod test;
\ No newline at end of file
+pub(crate) mod test;
diff --git a/src/mat.rs b/src/mat.rs
deleted file mode 100644
index 327df15..0000000
--- a/src/mat.rs
+++ /dev/null
@@ -1,70 +0,0 @@
-pub trait Mat<T> {
-    fn get(&self, row: usize, column: usize) -> T;
-    fn set(&mut self, row: usize, column: usize, value: T);
-    fn rows() -> Vec<Vec<T>>;
-}
-
-pub trait Csr<T>: Mat<T> {
-
-}
-
-pub struct Csr_f64 {
-    index_pointers: Vec<usize>,
-    indices: Vec<usize>,
-    data: Vec<f64>,
-}
-
-impl Csr_f64 {
-    pub fn new() -> Self {
-        Self {
-            index_pointers: Vec::new(),
-            indices: Vec::new(),
-            data: Vec::new(),
-        }
-    }
-}
-
-impl Csr<f64> for Csr_f64 {}
-
-impl Mat<f64> for Csr_f64 {
-    fn get(&self, row: usize, column: usize) -> f64 {
-        if row + 2 > self.index_pointers.len() {
-            0.0
-        }
-        let start_index = self.index_pointers[row];
-        let end_index = self.index_pointers[row + 1];
-
-        if start_index == end_index {
-            0.0
-        } else {
-            let mut index = start_index;
-            while index < end_index && column != self.indices[index] {
-                index += 1;
-            }
-            if index == end_index {
-                0.0
-            } else {
-                self.data[index]
-            }
-        }
-    }
-
-    fn set(&mut self, _row: usize, _column: usize, _value: T) {
-        panic!("Csr is immutable")
-    }
-
-    fn rows() -> Vec<Vec<f64>> {
-        todo!()
-        // public double[][] getRows() {
-        //     return toDense().getRows();
-        // }
-    }
-
-
-}
-
-impl Into<dyn Mat<T>> for Csr_f64{
-    fn into(self) -> Box<dyn Mat<T>> {
-        todo!()
-    }
-}
\ No newline at end of file
diff --git a/src/mat/bitmat.rs b/src/mat/bitmat.rs
index e69de29..33d208a 100644
--- a/src/mat/bitmat.rs
+++ b/src/mat/bitmat.rs
@@ -0,0 +1,84 @@
+use std::collections::BTreeMap;
+
+use crate::mat::{Mat, Numeric, Shape};
+
+// Mutable sparse matrix for boolean values
+// stored in u128
+struct SparseBitMat {
+    data: BTreeMap<usize, BTreeMap<usize, u128>>,
+}
+
+impl SparseBitMat {
+    fn new() -> Self {
+        Self {
+            data: BTreeMap::new()
+        }
+    }
+
+    pub fn set_true(&mut self, row_index: usize, col_index: usize) {
+        let d = self.get_byte(row_index, col_index);
+        *d |= 1 << (col_index % 128);
+    }
+
+    pub fn set_false(&mut self, row_index: usize, col_index: usize) {
+        let d = self.get_byte(row_index, col_index);
+        *d &= !(1 << (col_index % 128));
+    }
+
+    fn get_byte(&mut self, row_index: usize, col_index: usize) -> &mut u128 {
+        let row_index_b = row_index >> 7;
+        let col_index_b = col_index >> 7;
+        let mut row = self.data.entry(row_index_b).or_insert_with(BTreeMap::new);
+        let d = row.entry(col_index_b).or_insert(0_u128);
+        d
+    }
+
+
+}
+
+impl Mat<bool> for SparseBitMat {
+    fn get(&self, row_index: usize, col_index: usize) -> bool {
+        let row_index_b = row_index >> 7;
+        let col_index_b = col_index >> 7;
+        let row = self.data.get(&row_index_b);
+        if let Some(row) = row {
+            let d = row.get(&col_index_b);
+            if let Some(d) = d {
+                let bit = 1 << (col_index % 128);
+                return (*d & bit) != 0;
+            }
+        }
+        false
+    }
+
+    fn set(&mut self, row_index: usize, col_index: usize, value: bool) {
+        if value {
+            self.set_true(row_index, col_index);
+        } else {
+            self.set_false(row_index, col_index);
+        }
+    }
+
+
+    fn shape(&self) -> Shape {
+        todo!()
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use crate::mat::Mat;
+
+    #[test]
+    fn test_get_and_set() {
+        let mut mat = super::SparseBitMat::new();
+        mat.set(15, 15, true);
+        assert_eq!(mat.get(0, 0), false); //untouched
+        assert_eq!(mat.get(15, 15), true); //touched
+
+        mat.set(15, 15, false);
+        assert_eq!(mat.get(15, 15), false); //touched, set to false
+        mat.set(1001, 1001, false);
+        assert_eq!(mat.get(1001, 1001), false); //untouched, set to false
+    }
+}
\ No newline at end of file
diff --git a/src/mat/csr.rs b/src/mat/csr.rs
index 2682814..ca1c3ed 100644
--- a/src/mat/csr.rs
+++ b/src/mat/csr.rs
@@ -1,12 +1,16 @@
 use crate::mat::{Mat, Numeric, Shape};
+use crate::mat::sparse::SparseMat;
 
-pub struct Csr<T> where T: Numeric{
+/// Compressed Sparse Row matrix
+/// Immutable, can be constructed from Vec<Vec<T>>, or SparseMat<T>
+/// Better performance when iterating (i think), less memory
+pub struct CsrMat<T> where T: Numeric {
     index_pointers: Vec<usize>,
     indices: Vec<usize>,
     data: Vec<T>,
 }
 
-impl <T> Csr<T> where T:Numeric{
+impl<T> CsrMat<T> where T: Numeric {
     pub fn new() -> Self {
         Self {
             index_pointers: Vec::new(),
@@ -16,23 +20,23 @@ impl <T> Csr<T> where T:Numeric{
     }
 }
 
-impl <T> Mat<T> for Csr<T> where T:Numeric {
+impl<T> Mat<T> for CsrMat<T> where T: Numeric {
     fn get(&self, row: usize, column: usize) -> T {
         if row + 2 > self.index_pointers.len() {
-            return Numeric::default_value();
+            return Numeric::default::<T>();
         }
         let start_index = self.index_pointers[row];
         let end_index = self.index_pointers[row + 1];
 
         if start_index == end_index {
-            return Numeric::default_value();
+            return Numeric::default::<T>();
         } else {
             let mut index = start_index;
             while index < end_index && column != self.indices[index] {
                 index += 1;
             }
             if index == end_index {
-                return Numeric::default_value();
+                return Numeric::default::<T>();
             } else {
                 self.data[index]
             }
@@ -49,15 +53,15 @@ impl <T> Mat<T> for Csr<T> where T:Numeric {
     }
 }
 
-impl <T> From<Vec<Vec<T>>> for Csr<T> where T:Numeric + PartialEq{
+impl<T> From<Vec<Vec<T>>> for CsrMat<T> where T: Numeric + PartialEq {
     fn from(rows: Vec<Vec<T>>) -> Self {
         let mut this = Self::new();
 
         this.index_pointers.push(0);
 
         for row in rows {
-            for (index,value) in row.into_iter().enumerate(){
-                if value != value.default() {
+            for (index, value) in row.into_iter().enumerate() {
+                if value != Numeric::default::<T>() {
                     this.data.push(value);
                     this.indices.push(index);
                 }
@@ -66,4 +70,44 @@ impl <T> From<Vec<Vec<T>>> for Csr<T> where T:Numeric + PartialEq{
         }
         this
     }
+}
+
+impl<T> From<Box<dyn Mat<T>>> for CsrMat<T> where T: Numeric + PartialEq {
+    fn from(this: Box<dyn Mat<T>>) -> Self {
+        let mut csr = Self::new();
+
+        csr.index_pointers.push(0);
+        let (rows, cols) = Shape::into(this.shape());
+        for row in 0..rows {
+            for col in 0..cols {
+                let value = this.get(row, col);
+                if value != Numeric::default::<T>() {
+                    csr.data.push(value);
+                    csr.indices.push(col);
+                }
+            }
+            csr.index_pointers.push(csr.indices.len());
+        }
+        csr
+    }
+}
+
+
+#[cfg(test)]
+mod test {
+    use crate::mat::{Mat, Shape};
+    use crate::mat::csr::CsrMat;
+    use crate::mat::sparse::SparseMat;
+
+    #[test]
+    fn test_from_mat() {
+        let mut mat: Box<dyn Mat<u32>> = Box::new(SparseMat::new());
+        mat.set(1, 1, 1_u32);
+        mat.set(2, 2, 2_u32);
+
+        let csr: CsrMat<u32> = mat.into();
+        assert_eq!(csr.get(1, 1), 1);
+        assert_eq!(csr.get(2, 2), 2);
+        assert_eq!(csr.shape(), Shape::new(3, 3));
+    }
 }
\ No newline at end of file
diff --git a/src/mat/lib.rs b/src/mat/lib.rs
deleted file mode 100644
index 327df15..0000000
--- a/src/mat/lib.rs
+++ /dev/null
@@ -1,70 +0,0 @@
-pub trait Mat<T> {
-    fn get(&self, row: usize, column: usize) -> T;
-    fn set(&mut self, row: usize, column: usize, value: T);
-    fn rows() -> Vec<Vec<T>>;
-}
-
-pub trait Csr<T>: Mat<T> {
-
-}
-
-pub struct Csr_f64 {
-    index_pointers: Vec<usize>,
-    indices: Vec<usize>,
-    data: Vec<f64>,
-}
-
-impl Csr_f64 {
-    pub fn new() -> Self {
-        Self {
-            index_pointers: Vec::new(),
-            indices: Vec::new(),
-            data: Vec::new(),
-        }
-    }
-}
-
-impl Csr<f64> for Csr_f64 {}
-
-impl Mat<f64> for Csr_f64 {
-    fn get(&self, row: usize, column: usize) -> f64 {
-        if row + 2 > self.index_pointers.len() {
-            0.0
-        }
-        let start_index = self.index_pointers[row];
-        let end_index = self.index_pointers[row + 1];
-
-        if start_index == end_index {
-            0.0
-        } else {
-            let mut index = start_index;
-            while index < end_index && column != self.indices[index] {
-                index += 1;
-            }
-            if index == end_index {
-                0.0
-            } else {
-                self.data[index]
-            }
-        }
-    }
-
-    fn set(&mut self, _row: usize, _column: usize, _value: T) {
-        panic!("Csr is immutable")
-    }
-
-    fn rows() -> Vec<Vec<f64>> {
-        todo!()
-        // public double[][] getRows() {
-        //     return toDense().getRows();
-        // }
-    }
-
-
-}
-
-impl Into<dyn Mat<T>> for Csr_f64{
-    fn into(self) -> Box<dyn Mat<T>> {
-        todo!()
-    }
-}
\ No newline at end of file
diff --git a/src/mat/mod.rs b/src/mat/mod.rs
index 327df15..a30bcec 100644
--- a/src/mat/mod.rs
+++ b/src/mat/mod.rs
@@ -1,70 +1,120 @@
-pub trait Mat<T> {
-    fn get(&self, row: usize, column: usize) -> T;
-    fn set(&mut self, row: usize, column: usize, value: T);
-    fn rows() -> Vec<Vec<T>>;
+mod csr;
+mod sparse;
+mod bitmat;
+
+pub trait Mat<T: Numeric> {
+    fn get(&self, row_index: usize, col_index: usize) -> T;
+    fn set(&mut self, row_index: usize, col_index: usize, value: T);
+    fn shape(&self) -> Shape;
 }
 
-pub trait Csr<T>: Mat<T> {
-
+#[derive(PartialEq, Eq, Debug)]
+pub struct Shape {
+    rows: usize,
+    cols: usize,
 }
 
-pub struct Csr_f64 {
-    index_pointers: Vec<usize>,
-    indices: Vec<usize>,
-    data: Vec<f64>,
-}
-
-impl Csr_f64 {
-    pub fn new() -> Self {
+impl Shape {
+    pub fn new(rows: usize, cols: usize) -> Self {
         Self {
-            index_pointers: Vec::new(),
-            indices: Vec::new(),
-            data: Vec::new(),
+            rows,
+            cols,
         }
     }
 }
 
-impl Csr<f64> for Csr_f64 {}
-
-impl Mat<f64> for Csr_f64 {
-    fn get(&self, row: usize, column: usize) -> f64 {
-        if row + 2 > self.index_pointers.len() {
-            0.0
-        }
-        let start_index = self.index_pointers[row];
-        let end_index = self.index_pointers[row + 1];
-
-        if start_index == end_index {
-            0.0
-        } else {
-            let mut index = start_index;
-            while index < end_index && column != self.indices[index] {
-                index += 1;
-            }
-            if index == end_index {
-                0.0
-            } else {
-                self.data[index]
-            }
-        }
+impl From<Shape> for (usize, usize){
+    fn from(this: Shape) -> Self {
+        (this.rows, this.cols)
     }
-
-    fn set(&mut self, _row: usize, _column: usize, _value: T) {
-        panic!("Csr is immutable")
-    }
-
-    fn rows() -> Vec<Vec<f64>> {
-        todo!()
-        // public double[][] getRows() {
-        //     return toDense().getRows();
-        // }
-    }
-
-
 }
 
-impl Into<dyn Mat<T>> for Csr_f64{
-    fn into(self) -> Box<dyn Mat<T>> {
-        todo!()
+pub trait Numeric: Copy + Default {
+    fn default<T>() -> Self;
+}
+
+impl Numeric for f64 {
+    fn default<T>() -> f64 { 0.0 }
+}
+
+impl Numeric for f32 {
+    fn default<T>() -> f32 { 0.0 }
+}
+
+impl Numeric for usize {
+    fn default<T>() -> usize { 0 }
+}
+
+impl Numeric for isize {
+    fn default<T>() -> isize { 0 }
+}
+
+impl Numeric for i8 {
+    fn default<T>() -> i8 { 0 }
+}
+
+impl Numeric for u8 {
+    fn default<T>() -> u8 { 0 }
+}
+
+impl Numeric for i16 {
+    fn default<T>() -> i16 { 0 }
+}
+
+impl Numeric for u16 {
+    fn default<T>() -> u16 { 0 }
+}
+
+impl Numeric for i32 {
+    fn default<T>() -> i32 { 0 }
+}
+
+impl Numeric for u32 {
+    fn default<T>() -> u32 { 0 }
+}
+
+impl Numeric for i64 {
+    fn default<T>() -> i64 { 0 }
+}
+
+impl Numeric for u64 {
+    fn default<T>() -> u64 { 0 }
+}
+
+impl Numeric for i128 {
+    fn default<T>() -> i128 { 0 }
+}
+
+impl Numeric for bool {
+    fn default<T>() -> Self {
+        false
+    }
+}
+
+impl Numeric for u128 {
+    fn default<T>() -> u128 { 0 }
+}
+
+#[cfg(test)]
+mod test {
+    use mat::csr::CsrMat;
+    use mat::Mat;
+
+    use crate::mat;
+
+    #[test]
+    fn test_i32() {
+        let rows = vec![vec![1, 0, 0, 0], vec![2]];
+        let new_mat = CsrMat::from(rows);
+        assert_eq!(2, new_mat.get(1, 0));
+        assert_eq!(0, new_mat.get(10, 0));
+    }
+
+    #[test]
+    fn test_f64() {
+        let rows = vec![vec![1.0, 0.0, 0.0, 0.0], vec![2.0]];
+        let new_mat = CsrMat::from(rows);
+        assert_eq!(2.0, new_mat.get(1, 0));
+        assert_eq!(0.0, new_mat.get(10, 0));
     }
 }
\ No newline at end of file
diff --git a/src/mat/sparse.rs b/src/mat/sparse.rs
index e69de29..12271f0 100644
--- a/src/mat/sparse.rs
+++ b/src/mat/sparse.rs
@@ -0,0 +1,64 @@
+use std::collections::BTreeMap;
+
+use crate::mat::{Mat, Numeric, Shape};
+
+/// BTreeMap based implementation, useful for mutating
+/// every row is a map<index, value> and the matrix is a map<index, map>
+/// resulting in a map<row_index<map<col_index,value>>
+/// uses a BTreeMap to keep the keys (indexes) ordered.
+pub struct SparseMat<T: Numeric> {
+    data: BTreeMap<usize, BTreeMap<usize, T>>,
+}
+
+impl<T: Numeric> SparseMat<T> {
+    pub fn new() -> Self {
+        Self {
+            data: BTreeMap::new()
+        }
+    }
+}
+
+impl<T: Numeric> Mat<T> for SparseMat<T> {
+    fn get(&self, row_index: usize, col_index: usize) -> T {
+        self.data.get(&row_index)
+            .map(|row| row.get(&col_index)
+                .map(|v|*v)
+                .unwrap_or(Numeric::default::<T>()))
+            .unwrap_or(Numeric::default::<T>())
+    }
+
+    fn set(&mut self, row_index: usize, col_index: usize, value: T) {
+        let row = self.data.entry(row_index).or_insert_with(BTreeMap::new);
+        row.insert(col_index, value);
+    }
+
+    fn shape(&self) -> Shape {
+        let mut max_rows = 0;
+        let mut max_cols = 0;
+        for row_index in self.data.keys() {
+            let row_index = *row_index;
+            if row_index > max_rows {
+                max_rows = row_index;
+            }
+            let row = self.data.get(&row_index).unwrap();
+            let last_col = *row.keys().max().unwrap();
+            if last_col > max_cols {
+                max_cols = last_col;
+            }
+        }
+        Shape::new(max_rows + 1, max_cols + 1)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::mat::{Mat, Shape};
+    use crate::mat::sparse::SparseMat;
+
+    #[test]
+    fn shape() {
+        let mut mat = SparseMat::new();
+        mat.set(10, 11, 1.5);
+        assert_eq!(mat.shape(), Shape::new(11, 12));
+    }
+}
diff --git a/src/pipelines.rs b/src/pipelines.rs
index e69de29..ceb7d70 100644
--- a/src/pipelines.rs
+++ b/src/pipelines.rs
@@ -0,0 +1,29 @@
+use std::collections::BTreeMap;
+use std::collections::hash_map::DefaultHasher;
+use std::fs::File;
+use std::hash::{Hash, Hasher};
+use std::io::{self, BufRead};
+
+pub fn count() -> anyhow::Result<()> {
+    let mut store: BTreeMap<String, usize> = BTreeMap::new();
+    let stdin = io::stdin();
+    for line in stdin.lock().lines() {
+        let line = line?;
+        for token in line.split(|c: char| c.is_ascii_punctuation() || c.is_whitespace()) {
+            let count = store.entry(token.to_owned()).or_insert(0);
+            *count += 1;
+        }
+    }
+    for (key, value) in store{
+        println!("{}:{}", key,value);
+    }
+    Ok(())
+}
+
+fn hash(string: &str) -> u64 {
+    let mut hasher = DefaultHasher::new();
+    string.hash(&mut hasher);
+    hasher.finish()
+}
+
+pub fn create_binary_bow(file: File) {}
\ No newline at end of file