C11112331312111112111133133313331333133313331333112211231231221   >>    C1111233131211111211113313331333133313331333133311221123123122   <<    C11112331312111112111133133313331333133313331333112211231231223   >>      C11112331312111112111133133313331333133313331333112211231231222   >>