Task: Program Execution
Input (English): q, w, W, C, i
Output (English): [['q', 'w', 'W', 'C'], ['q', 'w', 'W', 'i'], ['q', 'w', 'C', 'i'], ['q', 'W', 'C', 'i'], ['w', 'W', 'C', 'i']]