Task: Program Execution
Input (English): 857, x, s, Q, o, 8511, 9529, 7421, k, 6317, k, U, 1797, a, o, U, c, 5003, 1139, 4369, D, D
Output (English): 2, 3, 4, 5, 9, 11, 12, 14, 15, 16, 17, 21, 22