C2122121212121133132213231313231323131323223313231322331312323221231   >>    C212212121212113313221323131323132313132322331323132233131232322123   <<    C2122121212121133132213231313231323131323223313231322331312323221233   >>      C2122121212121133132213231313231323131323223313231322331312323221232   >>