diff --git a/Cargo.lock b/Cargo.lock
index eeac30f..456d73c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,15 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "aho-corasick"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2969dcb958b36655471fc61f7e416fa76033bdd4bfed0678d8fee1e2d07a1f0"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "anstream"
 version = "0.6.11"
@@ -102,6 +111,12 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
+[[package]]
+name = "memchr"
+version = "2.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "523dc4f511e55ab87b694dc30d0f820d60906ef06413f93d4d7a1385599cc149"
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.78"
@@ -120,6 +135,35 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "regex"
+version = "1.10.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b62dbe01f0b06f9d8dc7d49e05a0785f153b00b2c227856282f671e0318c9b15"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-automata",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5bb987efffd3c6d0d8f5f89510bb458559eab11e4f869acb20bf845e016259cd"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
+
 [[package]]
 name = "strsim"
 version = "0.11.0"
@@ -131,6 +175,7 @@ name = "sudoku"
 version = "0.1.0"
 dependencies = [
  "clap",
+ "regex",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 97b63e8..42cd39b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,3 +7,4 @@ edition = "2021"
 
 [dependencies]
 clap = { version = "4.5.1", features = ["derive"] }
+regex = "1.10.3"
diff --git a/src/main.rs b/src/main.rs
index 1d5a4d0..cbaaf52 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,7 @@
 use clap::Parser;
 
+use regex::Regex;
+
 #[derive(Parser)]
 #[command(version, about, long_about = None)]
 struct Cli {
@@ -12,16 +14,16 @@ struct Cli {
     field_size: usize,
 }
 
-#[derive(PartialEq, Debug)]
+#[derive(PartialEq, Debug, Clone)]
 struct Playfield {
     fields: Vec<Vec<Field>>,
-    open_fields: Vec<u8>,
+    open_fields: Vec<u32>,
 }
 
 #[derive(Clone, PartialEq, Debug)]
 struct Field {
-    possible_values: Vec<u8>,
-    value: Option<u8>,
+    possible_values: Vec<u32>,
+    value: Option<u32>,
 }
 
 impl Playfield {
@@ -29,31 +31,30 @@ impl Playfield {
         let fields = vec![
             vec![
                 Field {
-                    possible_values: Vec::<u8>::new(),
+                    possible_values: Vec::<u32>::new(),
                     value: None
                 };
                 size
             ];
             size
         ];
-        let open_fields = Vec::<u8>::new();
         Self {
             fields,
-            open_fields,
+            open_fields: Vec::<u32>::new(),
         }
     }
 }
 
 impl Field {
-    fn new(value: u8) -> Field {
+    fn new(value: u32) -> Field {
         Self {
-            possible_values: Vec::<u8>::new(),
+            possible_values: Vec::<u32>::new(),
             value: Some(value),
         }
     }
     fn default() -> Field {
         Self {
-            possible_values: Vec::<u8>::new(),
+            possible_values: Vec::<u32>::new(),
             value: None,
         }
     }
@@ -63,12 +64,30 @@ fn main() {
     let cli = Cli::parse();
 
     let playfield = parse_playfield(&cli.field, cli.field_size);
-
-    println!("Hello, world!");
 }
 
 fn parse_playfield(field: &String, field_size: usize) -> Playfield {
-    Playfield::new(field_size)
+    let playfield = &mut Playfield::new(field_size);
+
+    let chars = field.split(" ").collect::<Vec<&str>>();
+
+    for row in 0..field_size {
+        for col in 0..field_size {
+            let field = &mut playfield.fields[row][col];
+            let char_field = chars.get(row * field_size + col).expect(&format!(
+                "Input must have dimension of size {size}x{size}",
+                size = field_size
+            ));
+
+            if *char_field == "0" {
+                continue;
+            }
+
+            field.value = Some(char_field.to_string().parse::<u32>().unwrap());
+        }
+    }
+
+    return playfield.clone();
 }
 
 #[cfg(test)]
@@ -78,7 +97,7 @@ mod tests {
     #[test]
     fn test_parse_field() {
         let input = "1 2 3 0 0 0 3 2 1";
-        let field_size = 2;
+        let field_size = 3;
 
         let playfield = parse_playfield(&input.to_string(), field_size);