Task: Program Execution
Input (English): M, 5, 7, M, y, 8
Output (English): [['M', '5', '7', 'M', 'y'], ['M', '5', '7', 'M', '8'], ['M', '5', '7', 'y', '8'], ['M', '5', 'M', 'y', '8'], ['M', '7', 'M', 'y', '8'], ['5', '7', 'M', 'y', '8']]