Task: Program Execution
Input (English): M, 1669, 6749, 8273, 2239, 3593, g, w, J, 9649, J, 8255, 5297, 7633, 9411, 4217, o, x, y, 5583, A, U, 6865, 883
Output (English): M, g, w, J, J, o, x, y, A, U