Task: Program Execution
Input (English): 9, R, 7, R, 4, s
Output (English): [['9', 'R', '7', 'R', '4'], ['9', 'R', '7', 'R', 's'], ['9', 'R', '7', '4', 's'], ['9', 'R', 'R', '4', 's'], ['9', '7', 'R', '4', 's'], ['R', '7', 'R', '4', 's']]