C11112331312111112111133133313121111331323132333132233132213231121   >>    C1111233131211111211113313331312111133132313233313223313221323112   <<    C11112331312111112111133133313121111331323132333132233132213231123   >>      C11112331312111112111133133313121111331323132333132233132213231122   >>