Task: Program Execution
Input (English): 3, B, x, I, 1
Output (English): [['3', 'B', 'x', 'I'], ['3', 'B', 'x', '1'], ['3', 'B', 'I', '1'], ['3', 'x', 'I', '1'], ['B', 'x', 'I', '1']]