C2122121212121133132213231313231323131323223313231322331313233313232213221   >>    C212212121212113313221323131323132313132322331323132233131323331323221322   <<    C2122121212121133132213231313231323131323223313231322331313233313232213223   >>      C2122121212121133132213231313231323131323223313231322331313233313232213222   >>