diff --git a/src/main/c/sudoku.c b/src/main/c/sudoku.c
index 353c70b..23ee743 100644
--- a/src/main/c/sudoku.c
+++ b/src/main/c/sudoku.c
@@ -404,7 +404,24 @@ void tipFunction(int grid[SIZE][SIZE]) {
             break;
 
         case 2:
-            printf("Case 2\n");
+            printf("Enter the coordinates (top-left cell of the 3x3 field) separated by space:\n");
+            int startRow, startCol;
+
+            while (true){
+            char row_squ[10];
+            char col_squ[10];
+            scanf("%s %s", row_squ, col_squ);
+
+
+            startRow = row_squ[0] - '0'; // Convert the first character to an integer
+            startCol = col_squ[0] - '0'; // Convert the first character to an integer
+
+            if (((startRow >= 1 && startRow <= 9) && row_squ[1] == '\0') && ((startCol >= 1 && startCol <= 9) && col_squ[1] == '\0')) {
+                break;
+            } else {
+                printf("Invalid input. Please enter a number between 1 and 9.\n");
+            }
+        }
             break;
 
         case 3: