Task: Program Execution
Input (English): 8557 5419 7163 9705 6697 3699 h 4569 6977 5693 r 4331 2265 7937 O U 8389 7381 a 6209 981 9297 5753 4941 N 9869 h 3869 X 4721
Output (English): 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 14, 17, 18, 20, 21, 22, 23, 24, 26, 28, 30