Task: Program Execution
Input (English): 1, U, J, N, 1
Output (English): [['1', 'U', 'J', 'N'], ['1', 'U', 'J', '1'], ['1', 'U', 'N', '1'], ['1', 'J', 'N', '1'], ['U', 'J', 'N', '1']]