C11112331312111112111133133313331333132322121111331333112232332123121   >>    C1111233131211111211113313331333133313232212111133133311223233212312   <<    C11112331312111112111133133313331333132322121111331333112232332123123   >>      C11112331312111112111133133313331333132322121111331333112232332123122   >>