Task: Program Execution
Input (English): Q, I, H, b, b
Output (English): [['Q', 'I', 'H', 'b'], ['Q', 'I', 'H', 'b'], ['Q', 'I', 'b', 'b'], ['Q', 'H', 'b', 'b'], ['I', 'H', 'b', 'b']]