C1111233131211111211113313331333133313331312331333133112331311311221   >>    C111123313121111121111331333133313331333131233133313311233131131122   <<    C1111233131211111211113313331333133313331312331333133112331311311223   >>      C1111233131211111211113313331333133313331312331333133112331311311222   >>