diff --git a/y2024/src/days/d21.rs b/y2024/src/days/d21.rs
index a2baabe..eba4346 100644
--- a/y2024/src/days/d21.rs
+++ b/y2024/src/days/d21.rs
@@ -396,8 +396,6 @@ impl From<&str> for Keypad {
 
 #[cfg(test)]
 mod tests {
-    use rayon::result;
-
     use super::*;
 
     const INPUT_1: &str = "029A";
@@ -406,12 +404,12 @@ mod tests {
     const INPUT_4: &str = "456A";
     const INPUT_5: &str = "379A";
 
-    //const INPUT_1_BACK: &str =
-    //    "<vA<AA>>^AvAA<^A>A<v<A>>^AvA^A<vA>^A<v<A>^A>AAvA^A<v<A>A>^AAAvA<^A>A";
-    //const INPUT_2_BACK: &str = "<v<A>>^AAAvA^A<vA<AA>>^AvAA<^A>A<v<A>A>^AAAvA<^A>A<vA>^A<A>A";
-    //const INPUT_3_BACK: &str =
-    //    "<v<A>>^A<vA<A>>^AAvAA<^A>A<v<A>>^AAvA^A<vA>^AA<A>A<v<A>A>^AAAvA<^A>A";
-    //const INPUT_4_BACK: &str = "<v<A>>^AA<vA<A>>^AAvAA<^A>A<vA>^A<A>A<vA>^A<A>A<v<A>A>^AAvA<^A>A";
+    const INPUT_1_BACK: &str =
+        "<vA<AA>>^AvAA<^A>A<v<A>>^AvA^A<vA>^A<v<A>^A>AAvA^A<v<A>A>^AAAvA<^A>A";
+    const INPUT_2_BACK: &str = "<v<A>>^AAAvA^A<vA<AA>>^AvAA<^A>A<v<A>A>^AAAvA<^A>A<vA>^A<A>A";
+    const INPUT_3_BACK: &str =
+        "<v<A>>^A<vA<A>>^AAvAA<^A>A<v<A>>^AAvA^A<vA>^AA<A>A<v<A>A>^AAAvA<^A>A";
+    const INPUT_4_BACK: &str = "<v<A>>^AA<vA<A>>^AAvAA<^A>A<vA>^A<A>A<vA>^A<A>A<v<A>A>^AAvA<^A>A";
     const INPUT_5_BACK: &str = "<v<A>>^AvA^A<vA<AA>>^AAvA<^A>AAvA^A<vA>^AA<A>A<v<A>A>^AAAvA<^A>A";
 
     #[test]
@@ -459,37 +457,45 @@ mod tests {
         assert_eq!(keypad_1.sequence, "<Av<AA>>^A");
     }
 
-    //#[test]
-    //fn part1_1_back() {
-    //    let result = Keypad::revert_from(INPUT_1_BACK);
-    //    let result = Keypad::revert_from(&result);
-    //    let result = Numpad::revert_from(&result);
-    //    assert_eq!(result, "029A");
-    //}
+    #[test]
+    fn part1_1_back() {
+        let result = Keypad::revert_from(INPUT_1_BACK);
+        println!("back 1 {result}");
+        let result = Keypad::revert_from(&result);
+        println!("back 2 {result}");
+        let result = Numpad::revert_from(&result);
+        assert_eq!(result, "029A");
+    }
 
-    //#[test]
-    //fn part1_2_back() {
-    //    let result = Keypad::revert_from(INPUT_2_BACK);
-    //    let result = Keypad::revert_from(&result);
-    //    let result = Numpad::revert_from(&result);
-    //    assert_eq!(result, "980A");
-    //}
+    #[test]
+    fn part1_2_back() {
+        let result = Keypad::revert_from(INPUT_2_BACK);
+        println!("back 1 {result}");
+        let result = Keypad::revert_from(&result);
+        println!("back 2 {result}");
+        let result = Numpad::revert_from(&result);
+        assert_eq!(result, "980A");
+    }
 
-    //#[test]
-    //fn part1_3_back() {
-    //    let result = Keypad::revert_from(INPUT_3_BACK);
-    //    let result = Keypad::revert_from(&result);
-    //    let result = Numpad::revert_from(&result);
-    //    assert_eq!(result, "179A");
-    //}
+    #[test]
+    fn part1_3_back() {
+        let result = Keypad::revert_from(INPUT_3_BACK);
+        println!("back 1 {result}");
+        let result = Keypad::revert_from(&result);
+        println!("back 2 {result}");
+        let result = Numpad::revert_from(&result);
+        assert_eq!(result, "179A");
+    }
 
-    //#[test]
-    //fn part1_4_back() {
-    //    let result = Keypad::revert_from(INPUT_4_BACK);
-    //    let result = Keypad::revert_from(&result);
-    //    let result = Numpad::revert_from(&result);
-    //    assert_eq!(result, "456A");
-    //}
+    #[test]
+    fn part1_4_back() {
+        let result = Keypad::revert_from(INPUT_4_BACK);
+        println!("back 1 {result}");
+        let result = Keypad::revert_from(&result);
+        println!("back 2 {result}");
+        let result = Numpad::revert_from(&result);
+        assert_eq!(result, "456A");
+    }
 
     #[test]
     fn part1_5_back() {