C212212121212113313221323131323131323132322331323132233132312121111   >>    C21221212121211331322132313132313132313232233132313223313231212111   <<    C212212121212113313221323131323131323132322331323132233132312121113   >>      C212212121212113313221323131323131323132322331323132233132312121112   >>