Task: Program Execution
Input (English): 6, 1, A, 8, U, 8
Output (English): [['6', '1', 'A', '8', 'U'], ['6', '1', 'A', '8', '8'], ['6', '1', 'A', 'U', '8'], ['6', '1', '8', 'U', '8'], ['6', 'A', '8', 'U', '8'], ['1', 'A', '8', 'U', '8']]