Task: Program Execution
Input (English): O, 6, k, 6, 1, 5
Output (English): [['O', '6', 'k', '6', '1'], ['O', '6', 'k', '6', '5'], ['O', '6', 'k', '1', '5'], ['O', '6', '6', '1', '5'], ['O', 'k', '6', '1', '5'], ['6', 'k', '6', '1', '5']]