diff --git a/src/main/c/sudoku.c b/src/main/c/sudoku.c
index 41f512f..2c82cfd 100644
--- a/src/main/c/sudoku.c
+++ b/src/main/c/sudoku.c
@@ -215,6 +215,21 @@ void generateSudoku(int grid[SIZE][SIZE], int difficulty, int level) {
 
 void turnFunction(int grid[SIZE][SIZE]) {
         printf("\nTurn function - Choose an action:\n");
+
+         int action;
+
+        while (true){
+            char action_str[10];
+            scanf("%s", action_str);
+
+            action = action_str[0] - '0'; // Convert the first character to an integer
+
+            if ((action >= 1 && action <= 6) && action_str[1] == '\0') {
+                break;
+            } else {
+                printf("Invalid input. Please enter a number between 1 and 6.\n");
+            }
+        }
 }