Task: Program Execution
Input (English): 1443, D, 4399, 2079, V, 21, 2935, 9883, Y, 4739, 9819, N, H, o, I, Z, q, X, 9739, 7307, X
Output (English): 2, 5, 9, 12, 13, 14, 15, 16, 17, 18, 21