C111112111133131121133133313331333133313331323133313331333133313231323112221211   >>    C11111211113313112113313331333133313331333132313331333133313331323132311222121   <<    C111112111133131121133133313331333133313331323133313331333133313231323112221213   >>      C111112111133131121133133313331333133313331323133313331333133313231323112221212   >>