C2122121212121133132213231313231313231323223313231322331323221212121   >>    C212212121212113313221323131323131323132322331323132233132322121212   <<    C2122121212121133132213231313231313231323223313231322331323221212123   >>      C2122121212121133132213231313231313231323223313231322331323221212122   >>