Task: Program Execution
Input (English): D, a, V, Z, v, z
Output (English): [['D', 'a', 'V', 'Z', 'v'], ['D', 'a', 'V', 'Z', 'z'], ['D', 'a', 'V', 'v', 'z'], ['D', 'a', 'Z', 'v', 'z'], ['D', 'V', 'Z', 'v', 'z'], ['a', 'V', 'Z', 'v', 'z']]