Task: Program Execution
Input (English): O, 5, I, o, 7, 6
Output (English): [['O', '5', 'I', 'o', '7'], ['O', '5', 'I', 'o', '6'], ['O', '5', 'I', '7', '6'], ['O', '5', 'o', '7', '6'], ['O', 'I', 'o', '7', '6'], ['5', 'I', 'o', '7', '6']]