Task: Program Execution
Input (English): 7, 4, 4, y, 1, r
Output (English): [['7', '4', '4', 'y', '1'], ['7', '4', '4', 'y', 'r'], ['7', '4', '4', '1', 'r'], ['7', '4', 'y', '1', 'r'], ['7', '4', 'y', '1', 'r'], ['4', '4', 'y', '1', 'r']]