C11112331312111112111133133313331333131133132313331333121111331333133313221221   >>    C1111233131211111211113313331333133313113313231333133312111133133313331322122   <<    C11112331312111112111133133313331333131133132313331333121111331333133313221223   >>      C11112331312111112111133133313331333131133132313331333121111331333133313221222   >>