C11112331312111112111133133313331333131133132322133313123222121   >>    C1111233131211111211113313331333133313113313232213331312322212   <<    C11112331312111112111133133313331333131133132322133313123222123   >>      C11112331312111112111133133313331333131133132322133313123222122   >>