C111112111133131121133133313331333133313331323133313331333133313222313121221   >>    C11111211113313112113313331333133313331333132313331333133313331322231312122   <<    C111112111133131121133133313331333133313331323133313331333133313222313121223   >>      C111112111133131121133133313331333133313331323133313331333133313222313121222   >>