Task: Program Execution
Input (English): Y, 6, 7, D, n, U, 2
Output (English): [['Y', '6', '7', 'D', 'n', 'U'], ['Y', '6', '7', 'D', 'n', '2'], ['Y', '6', '7', 'D', 'U', '2'], ['Y', '6', '7', 'n', 'U', '2'], ['Y', '6', 'D', 'n', 'U', '2'], ['Y', '7', 'D', 'n', 'U', '2'], ['6', '7', 'D', 'n', 'U', '2']]