Task: Program Execution
Input (English): 2727, 7543, x, I, 6849, N, Z, 1305, t, 1873, 9435, 9715, 4653, y, X, 8589, 6089, H, M, 1927
Output (English): 1, 2, 5, 8, 10, 11, 12, 13, 16, 17, 20