Task: Program Execution
Input (English): 7, U, 4, M, 2, T, 8
Output (English): [['7', 'U', '4', 'M', '2', 'T'], ['7', 'U', '4', 'M', '2', '8'], ['7', 'U', '4', 'M', 'T', '8'], ['7', 'U', '4', '2', 'T', '8'], ['7', 'U', 'M', '2', 'T', '8'], ['7', '4', 'M', '2', 'T', '8'], ['U', '4', 'M', '2', 'T', '8']]