Task: Program Execution
Input (English): S, 7473, 4657, 5863, 2133, u, S, 6493, o, 6949, 6103, 3409, l, 3205, 8545, f, w, 4873, 8523, h
Output (English): 2, 3, 4, 5, 8, 10, 11, 12, 14, 15, 18, 19