Task: Program Execution
Input (English): 1623, Q, A, G, 9535, A, 8791, 6999, 7483, 6597, A, 6203, 8837, M, O, c, 5699, 15, 9955, 8061, K, b, p
Output (English): 2, 3, 4, 6, 11, 14, 15, 16, 21, 22, 23