C111112111133131121133133313331333133313331323133313331333133313233211111223331   >>    C11111211113313112113313331333133313331333132313331333133313331323321111122333   <<    C111112111133131121133133313331333133313331323133313331333133313233211111223333   >>      C111112111133131121133133313331333133313331323133313331333133313233211111223332   >>