C11112331312111112111133133313331333132322121111331312113313331333133112311221   >>    C1111233131211111211113313331333133313232212111133131211331333133313311231122   <<    C11112331312111112111133133313331333132322121111331312113313331333133112311223   >>      C11112331312111112111133133313331333132322121111331312113313331333133112311222   >>