Task: Program Execution
Input (English): 5, U, 4, j, d, 7, 6
Output (English): [['5', 'U', '4', 'j', 'd', '7'], ['5', 'U', '4', 'j', 'd', '6'], ['5', 'U', '4', 'j', '7', '6'], ['5', 'U', '4', 'd', '7', '6'], ['5', 'U', 'j', 'd', '7', '6'], ['5', '4', 'j', 'd', '7', '6'], ['U', '4', 'j', 'd', '7', '6']]