C212212121212113313221323131323131323132322331323132233132333131212111   >>    C21221212121211331322132313132313132313232233132313223313233313121211   <<    C212212121212113313221323131323131323132322331323132233132333131212113   >>      C212212121212113313221323131323131323132322331323132233132333131212112   >>