Task: Program Execution
Input (English): j, o, 9571, 193, 6227, m, 4515, 5953, G, 4173, w, 8371, 2839, l, 8213, 8947, S, Z, 2281, 9791
Output (English): 3, 4, 5, 7, 8, 10, 12, 13, 15, 16, 19, 20