Task: Program Execution
Input (English): X, 6, a, 9, W, 9
Output (English): [['X', '6', 'a', '9', 'W'], ['X', '6', 'a', '9', '9'], ['X', '6', 'a', 'W', '9'], ['X', '6', '9', 'W', '9'], ['X', 'a', '9', 'W', '9'], ['6', 'a', '9', 'W', '9']]