C31232233133313221211113313331311331333133313331311331333133313231313221   >>    C3123223313331322121111331333131133133313331333131133133313331323131322   <<    C31232233133313221211113313331311331333133313331311331333133313231313223   >>      C31232233133313221211113313331311331333133313331311331333133313231313222   >>