Task: Program Execution
Input (English): R, 7, 1, 4, O, 5
Output (English): [['R', '7', '1', '4', 'O'], ['R', '7', '1', '4', '5'], ['R', '7', '1', 'O', '5'], ['R', '7', '4', 'O', '5'], ['R', '1', '4', 'O', '5'], ['7', '1', '4', 'O', '5']]