Task: Program Execution
Input (English): f, w, 6, 0, 4, V, a
Output (English): [['f', 'w', '6', '0', '4', 'V'], ['f', 'w', '6', '0', '4', 'a'], ['f', 'w', '6', '0', 'V', 'a'], ['f', 'w', '6', '4', 'V', 'a'], ['f', 'w', '0', '4', 'V', 'a'], ['f', '6', '0', '4', 'V', 'a'], ['w', '6', '0', '4', 'V', 'a']]