C11112331312111112111133133313331333131133132313331333121111331322121121   >>    C1111233131211111211113313331333133313113313231333133312111133132212112   <<    C11112331312111112111133133313331333131133132313331333121111331322121123   >>      C11112331312111112111133133313331333131133132313331333121111331322121122   >>