Task: Program Execution
Input (English): 7477, 2581, L, 7561, n, 7781, 481, J, 7001, 549, 9359, 1099, x, O, 4339, 3093, 23, 7257, 6045, q, D, t
Output (English): 3, 5, 8, 13, 14, 20, 21, 22