C111112111133131121133133313331323133313221211111333133313331333112211232313221   >>    C11111211113313112113313331333132313331322121111133313331333133311221123231322   <<    C111112111133131121133133313331323133313221211111333133313331333112211232313223   >>      C111112111133131121133133313331323133313221211111333133313331333112211232313222   >>