Task: Program Execution
Input (English): 2, x, 9, L, 7, 7
Output (English): [['2', 'x', '9', 'L', '7'], ['2', 'x', '9', 'L', '7'], ['2', 'x', '9', '7', '7'], ['2', 'x', 'L', '7', '7'], ['2', '9', 'L', '7', '7'], ['x', '9', 'L', '7', '7']]