Task: Program Execution
Input (English): G, u, 3737, 621, c, 8339, 4425, 6693, X, N, 1919, 5797, 3475, F, 2891, 6925, 8291, U, 4475, 1133, 6697, 5811, 7723
Output (English): 3, 4, 6, 7, 8, 11, 12, 13, 15, 16, 17, 19, 20, 21, 22, 23