C1111233131211111211113313331333133313331312331333133112133223331   >>    C111123313121111121111331333133313331333131233133313311213322333   <<    C1111233131211111211113313331333133313331312331333133112133223333   >>      C1111233131211111211113313331333133313331312331333133112133223332   >>