Task: Program Execution
Input (English): 1453, Z, S, 4171, 8653, 7517, Z, r, 4599, 6445, k, 2769, 9929, 3219, N, V, L, 6023, g
Output (English): 1, 4, 5, 6, 9, 10, 12, 13, 14, 18