Task: Program Execution
Input (English): u, j, y, 9051, I, 571, 1979, S, 6747, N, 6539, 1073, M, 185, 6411, l, n, 7135, C, C
Output (English): 1, 2, 3, 5, 8, 10, 13, 16, 17, 19, 20