C3123121111113313121111331333133313331333223313231333133313231333133112233121   >>    C312312111111331312111133133313331333133322331323133313331323133313311223312   <<    C3123121111113313121111331333133313331333223313231333133313231333133112233123   >>      C3123121111113313121111331333133313331333223313231333133313231333133112233122   >>