Task: Program Execution
Input (English): 1237, 927, 6535, f, 6313, 2847, g, 8773, 6781, 4261, 5595, b, 6039, M, u, 7963, 5551, s, 9239, 5799, 8745, I
Output (English): 1237, 927, 6535, 6, 6313, 2847, 7, 8773, 6781, 4261, 5595, 2, 6039, 13, 21, 7963, 5551, 19, 9239, 5799, 8745, 9