Task: Program Execution
Input (English): l, C, c, e, 6, v, z
Output (English): [['l', 'C', 'c', 'e', '6', 'v'], ['l', 'C', 'c', 'e', '6', 'z'], ['l', 'C', 'c', 'e', 'v', 'z'], ['l', 'C', 'c', '6', 'v', 'z'], ['l', 'C', 'e', '6', 'v', 'z'], ['l', 'c', 'e', '6', 'v', 'z'], ['C', 'c', 'e', '6', 'v', 'z']]