Task: Program Execution
Input (English): 4, 8, e, v, c, 3, r
Output (English): [['4', '8', 'e', 'v', 'c', '3'], ['4', '8', 'e', 'v', 'c', 'r'], ['4', '8', 'e', 'v', '3', 'r'], ['4', '8', 'e', 'c', '3', 'r'], ['4', '8', 'v', 'c', '3', 'r'], ['4', 'e', 'v', 'c', '3', 'r'], ['8', 'e', 'v', 'c', '3', 'r']]