Task: Program Execution
Input (English): 2, u, 5, Y, 7, 6, k
Output (English): [['2', 'u', '5', 'Y', '7', '6'], ['2', 'u', '5', 'Y', '7', 'k'], ['2', 'u', '5', 'Y', '6', 'k'], ['2', 'u', '5', '7', '6', 'k'], ['2', 'u', 'Y', '7', '6', 'k'], ['2', '5', 'Y', '7', '6', 'k'], ['u', '5', 'Y', '7', '6', 'k']]