C31232233133313221211113313331333133313113311331333133322212121   >>    C3123223313331322121111331333133313331311331133133313332221212   <<    C31232233133313221211113313331333133313113311331333133322212123   >>      C31232233133313221211113313331333133313113311331333133322212122   >>