Task: Program Execution
Input (English): 1, q, 5, z, u
Output (English): [['1', 'q', '5', 'z'], ['1', 'q', '5', 'u'], ['1', 'q', 'z', 'u'], ['1', '5', 'z', 'u'], ['q', '5', 'z', 'u']]