C11112331312111112111133133313121111331121131211113313223313232213121   >>    C1111233131211111211113313331312111133112113121111331322331323221312   <<    C11112331312111112111133133313121111331121131211113313223313232213123   >>      C11112331312111112111133133313121111331121131211113313223313232213122   >>