Task: Program Execution
Input (English): y, 4, o, 9, k, i
Output (English): [['y', '4', 'o', '9', 'k'], ['y', '4', 'o', '9', 'i'], ['y', '4', 'o', 'k', 'i'], ['y', '4', '9', 'k', 'i'], ['y', 'o', '9', 'k', 'i'], ['4', 'o', '9', 'k', 'i']]