C212212121212113313221323131323131323132322331323132233132312111111   >>    C21221212121211331322132313132313132313232233132313223313231211111   <<    C212212121212113313221323131323131323132322331323132233132312111113   >>      C212212121212113313221323131323131323132322331323132233132312111112   >>