Task: Program Execution
Input (English): 6371, M, Q, o, c, 8401, i, 3865, P, 321, f, 5781, 6995, 2253, N, 6757, 6357, 883, s, 5345, 6913
Output (English): 1, 6, 8, 10, 12, 13, 14, 16, 17, 18, 20, 21