C11112331312111112111133133313331333132323213311331323133313113313133313121221   >>    C1111233131211111211113313331333133313232321331133132313331311331313331312122   <<    C11112331312111112111133133313331333132323213311331323133313113313133313121223   >>      C11112331312111112111133133313331333132323213311331323133313113313133313121222   >>