Task: Program Execution
Input (English): 8, S, 9, o, 7, 4
Output (English): [['8', 'S', '9', 'o', '7'], ['8', 'S', '9', 'o', '4'], ['8', 'S', '9', '7', '4'], ['8', 'S', 'o', '7', '4'], ['8', '9', 'o', '7', '4'], ['S', '9', 'o', '7', '4']]