Task: Program Execution
Input (English): C, C, L, f, v, 0
Output (English): [['C', 'C', 'L', 'f', 'v'], ['C', 'C', 'L', 'f', '0'], ['C', 'C', 'L', 'v', '0'], ['C', 'C', 'f', 'v', '0'], ['C', 'L', 'f', 'v', '0'], ['C', 'L', 'f', 'v', '0']]