Task: Program Execution
Input (English): l, u, 2523, 6383, o, o, 1619, r, 331, 5933, 4189, z, 929, v, 2185, 1181, B, 8231, k, q, 2797, 4627, U
Output (English): 3, 4, 7, 9, 10, 11, 13, 15, 16, 18, 21, 22