C11112331312111112111133133313331333133313331333133313331211113313233313221   >>    C1111233131211111211113313331333133313331333133313331333121111331323331322   <<    C11112331312111112111133133313331333133313331333133313331211113313233313223   >>      C11112331312111112111133133313331333133313331333133313331211113313233313222   >>