C1231321123223331211111131211113313331333132313331333112233232112222132212211   >>    C123132112322333121111113121111331333133313231333133311223323211222213221221   <<    C1231321123223331211111131211113313331333132313331333112233232112222132212213   >>      C1231321123223331211111131211113313331333132313331333112233232112222132212212   >>