Task: Program Execution
Input (English): U, k, 7, i, o, 0, s
Output (English): [['U', 'k', '7', 'i', 'o', '0'], ['U', 'k', '7', 'i', 'o', 's'], ['U', 'k', '7', 'i', '0', 's'], ['U', 'k', '7', 'o', '0', 's'], ['U', 'k', 'i', 'o', '0', 's'], ['U', '7', 'i', 'o', '0', 's'], ['k', '7', 'i', 'o', '0', 's']]