Task: Program Execution
Input (English): 1249, w, 2939, 6219, 7503, O, a, 237, 8381, o, D, 6251, 6837, 8049, M, 8401, 483, 3167, h, 5165, 4237, a
Output (English): 1, 3, 4, 5, 8, 9, 12, 13, 14, 16, 17, 18, 20, 21