Task: Program Execution
Input (English): 7553 R W R z 6661 2921 8915 c 9941 3111 k 7327 5331 O J 5481 2423 Z U 1633 6733 A 3877 7261
Output (English): 2, 3, 4, 5, 9, 12, 15, 16, 19, 20, 23