Task: Program Execution
Input (English): 4, L, 1, x, z
Output (English): [['4', 'L', '1', 'x'], ['4', 'L', '1', 'z'], ['4', 'L', 'x', 'z'], ['4', '1', 'x', 'z'], ['L', '1', 'x', 'z']]