C1231321123223331211111131211113313331333132313331333112233232123212133112211   >>    C123132112322333121111113121111331333133313231333133311223323212321213311221   <<    C1231321123223331211111131211113313331333132313331333112233232123212133112213   >>      C1231321123223331211111131211113313331333132313331333112233232123212133112212   >>