C11112331333132311331333133313331333112211231211113313223313331323221221   >>    C1111233133313231133133313331333133311221123121111331322331333132322122   <<    C11112331333132311331333133313331333112211231211113313223313331323221223   >>      C11112331333132311331333133313331333112211231211113313223313331323221222   >>