Task: Program Execution
Input (English): 5, U, 7, e, 1, 8
Output (English): [['5', 'U', '7', 'e', '1'], ['5', 'U', '7', 'e', '8'], ['5', 'U', '7', '1', '8'], ['5', 'U', 'e', '1', '8'], ['5', '7', 'e', '1', '8'], ['U', '7', 'e', '1', '8']]