Task: Program Execution
Input (English): 5, K, 6, k, B
Output (English): [['5', 'K', '6', 'k'], ['5', 'K', '6', 'B'], ['5', 'K', 'k', 'B'], ['5', '6', 'k', 'B'], ['K', '6', 'k', 'B']]