C31232233133313221211113313331311331333133313331311331333133313112211231231   >>    C3123223313331322121111331333131133133313331333131133133313331311221123123   <<    C31232233133313221211113313331311331333133313331311331333133313112211231233   >>      C31232233133313221211113313331311331333133313331311331333133313112211231232   >>