C111123313121111121111331333133313331333133313121111133313331333133313222223221   >>    C11112331312111112111133133313331333133313331312111113331333133313331322222322   <<    C111123313121111121111331333133313331333133313121111133313331333133313222223223   >>      C111123313121111121111331333133313331333133313121111133313331333133313222223222   >>