diff --git a/2023/day4/src/main.rs b/2023/day4/src/main.rs
index 47a249c..47ddaed 100644
--- a/2023/day4/src/main.rs
+++ b/2023/day4/src/main.rs
@@ -1,5 +1,31 @@
+use std::collections::HashMap;
+
 const FILE_STR: &'static str = include_str!("input.txt");
 
+#[derive(Default)]
+struct ScratchCard {
+    winning: Vec<usize>,
+    chosen: Vec<usize>,
+}
+
+impl ScratchCard {
+    fn new(winning: Vec<usize>, chosen: Vec<usize>) -> Self {
+        ScratchCard { winning, chosen }
+    }
+}
+
+type GameMap = HashMap<usize, ScratchCard>;
+
+fn parse_game_table(table: &str) -> GameMap {
+    let mut map = HashMap::new();
+
+    table.split('\n').for_each(|line| {
+        todo!();
+    });
+
+    map
+}
+
 fn part_one() {
     todo!();
 }