Task: Program Execution
Input (English): 1, 7, h, 7, Q, 4, U
Output (English): [['1', '7', 'h', '7', 'Q', '4'], ['1', '7', 'h', '7', 'Q', 'U'], ['1', '7', 'h', '7', '4', 'U'], ['1', '7', 'h', 'Q', '4', 'U'], ['1', '7', '7', 'Q', '4', 'U'], ['1', 'h', '7', 'Q', '4', 'U'], ['7', 'h', '7', 'Q', '4', 'U']]