diff --git a/src/days/template.rs b/src/days/template.rs
index e26d1a5..a9b695c 100644
--- a/src/days/template.rs
+++ b/src/days/template.rs
@@ -1,21 +1,21 @@
 use crate::prelude::*;
 
-pub type I = String;
+pub type I = Vec<String>;
 pub type O = i64;
 
 fn _parse (data: &str) -> I {
     Default::default()
 }
 
-fn _solve (data: I) -> O {
+fn _solve (data: &I) -> O {
     Default::default()
 }
 
-fn _silver (data: I) -> O {
+fn _silver (data: &I) -> O {
     Default::default()
 }
 
-fn _gold (data: I) -> O {
+fn _gold (data: &I) -> O {
     Default::default()
 }
 
@@ -28,6 +28,14 @@ mod test {
         _parse(data)
     }
 
+    #[test]
+    fn sample () {
+        let data = "";
+        let data = parse(data);
+
+        assert_eq(1, 1)
+    }
+
     #[test]
     fn silver () {
         let data = read();