Task: Program Execution
Input (English): O, 8921, N, 6213, 4571, 3409, h, H, 5095, 9611, 4265, C, 6937, R, t, 5247, 5223, 3181, t, R, 7593, 2241, s, h
Output (English): 2, 4, 5, 6, 9, 10, 11, 13, 16, 17, 18, 21, 22