C212212121212113313221323131323131323132322331323111133132212111   >>    C21221212121211331322132313132313132313232233132311113313221211   <<    C212212121212113313221323131323131323132322331323111133132212113   >>      C212212121212113313221323131323131323132322331323111133132212112   >>