C111112111133131121133133313331333131131211113313331333133313231333132322121221   >>    C11111211113313112113313331333133313113121111331333133313331323133313232212122   <<    C111112111133131121133133313331333131131211113313331333133313231333132322121223   >>      C111112111133131121133133313331333131131211113313331333133313231333132322121222   >>