C31232233133313221211113313331333131211113313231311331311212121   >>    C3123223313331322121111331333133313121111331323131133131121212   <<    C31232233133313221211113313331333131211113313231311331311212123   >>      C31232233133313221211113313331333131211113313231311331311212122   >>