C31232233133313221211113313331311331333133313331333231333131221   >>    C3123223313331322121111331333131133133313331333133323133313122   <<    C31232233133313221211113313331311331333133313331333231333131223   >>      C31232233133313221211113313331311331333133313331333231333131222   >>