C11112331312111112111133133313331333132323213311331323133313113313111121   >>    C1111233131211111211113313331333133313232321331133132313331311331311112   <<    C11112331312111112111133133313331333132323213311331323133313113313111123   >>      C11112331312111112111133133313331333132323213311331323133313113313111122   >>