Task: Program Execution
Input (English): a, 2, 5, Y, 9, b
Output (English): [['a', '2', '5', 'Y', '9'], ['a', '2', '5', 'Y', 'b'], ['a', '2', '5', '9', 'b'], ['a', '2', 'Y', '9', 'b'], ['a', '5', 'Y', '9', 'b'], ['2', '5', 'Y', '9', 'b']]