C11112331312111112111133133313331333133313331333133313331211113313221323123221   >>    C1111233131211111211113313331333133313331333133313331333121111331322132312322   <<    C11112331312111112111133133313331333133313331333133313331211113313221323123223   >>      C11112331312111112111133133313331333133313331333133313331211113313221323123222   >>