Task: Program Execution
Input (English): Z, 8583, 6667, L, a, Q, U, p, 3943, b, b, F, O, 3859, o, Z, t, 7977, 6075, M, 4659
Output (English): 1, 4, 5, 6, 7, 8, 10, 11, 12, 13, 15, 16, 17, 20