Task: Program Execution
Input (English): r, 4, q, i, z
Output (English): [['r', '4', 'q', 'i'], ['r', '4', 'q', 'z'], ['r', '4', 'i', 'z'], ['r', 'q', 'i', 'z'], ['4', 'q', 'i', 'z']]