C111112111133131121133133313331333121111112113313231333133313223313222323212121   >>    C11111211113313112113313331333133312111111211331323133313331322331322232321212   <<    C111112111133131121133133313331333121111112113313231333133313223313222323212123   >>      C111112111133131121133133313331333121111112113313231333133313223313222323212122   >>