diff --git a/Commissions/flis/IMT/Case3/case3.c b/Commissions/flis/IMT/Case3/case3.c
index 7445ed9..4b77b23 100644
--- a/Commissions/flis/IMT/Case3/case3.c
+++ b/Commissions/flis/IMT/Case3/case3.c
@@ -37,10 +37,8 @@ int numbers[] = {113, 11354, 77777, 255044};
 
 int main(void) {
     struct Node* root = newNode();
-    printf("%p\n", root);
-
     int n_numbers = sizeof(numbers)/sizeof(int);
-    
+
     for (int i = 0; i < n_numbers; i++) {       // Go through all the phone numbers in the global list
         struct Node* pointer = root;            // Create a pointer that points to whatever part of the trie we're working on
         char number[8 + 1];                         // A number has 8 + \0 chars
@@ -66,7 +64,6 @@ int main(void) {
                     };
                 };
                 if (continues == true) {
-                    printf("FOUND PREFIX IN NUMBER\n");
                     printf("%s and %s", number, number);
                     while (pointer->isEnd != true) { // follow the first path you can find
                         for (int k = 0; k < 10; k++) {
@@ -82,14 +79,14 @@ int main(void) {
                     return 0; // return true or success or whatever
                 };
                 pointer->isEnd = true;
-            };
-            if (pointer->isEnd == true) {  // if we've already seen a shorter number with this prefix
-                printf("Found prefix!\n");
-                for (int k = 0; k < j; k++) {
+            }
+            else if (pointer->isEnd == true) {  // if we've already seen a shorter number with this prefix
+                for (int k = 0; k <= j; k++) {
                     printf("%c", number[k]);
                 }
-                printf("\n");
+                printf(" and %i\n", numbers[i]);
+                return 0;
             };
         };
     };
-}
\ No newline at end of file
+}
diff --git a/Commissions/flis/IMT/Case3/shell.nix b/Commissions/flis/IMT/Case3/shell.nix
index d364c29..ca0b8c5 100644
--- a/Commissions/flis/IMT/Case3/shell.nix
+++ b/Commissions/flis/IMT/Case3/shell.nix
@@ -1,5 +1,5 @@
 with import <nixpkgs> {};
 stdenv.mkDerivation {
   name = "c-shell";
-  buildInputs = [ gcc gnumake ];
+  buildInputs = [ gcc gnumake gdb ];
 }