Task: Program Execution
Input (English): q, 7, 5, 3, f, l
Output (English): [['q', '7', '5', '3', 'f'], ['q', '7', '5', '3', 'l'], ['q', '7', '5', 'f', 'l'], ['q', '7', '3', 'f', 'l'], ['q', '5', '3', 'f', 'l'], ['7', '5', '3', 'f', 'l']]