Task: Program Execution
Input (English): X, 9, 7, Y, 9, 7, 0
Output (English): [['X', '9', '7', 'Y', '9', '7'], ['X', '9', '7', 'Y', '9', '0'], ['X', '9', '7', 'Y', '7', '0'], ['X', '9', '7', '9', '7', '0'], ['X', '9', 'Y', '9', '7', '0'], ['X', '7', 'Y', '9', '7', '0'], ['9', '7', 'Y', '9', '7', '0']]