C31232233133313221211113313331333131211113313223313232233133313222212121   >>    C3123223313331322121111331333133313121111331322331323223313331322221212   <<    C31232233133313221211113313331333131211113313223313232233133313222212123   >>      C31232233133313221211113313331333131211113313223313232233133313222212122   >>