Task: Program Execution
Input (English): 7037, 9465, 3723, u, B, l, g, R, S, 9415, e, 6559, 6429, M, 2571, 1097, 8649, o, W, s, t
Output (English): 4, 5, 6, 7, 8, 9, 11, 14, 18, 19, 20, 21