C1231321123223331211111131211113313331333132313331333112233232112233121313221   >>    C123132112322333121111113121111331333133313231333133311223323211223312131322   <<    C1231321123223331211111131211113313331333132313331333112233232112233121313223   >>      C1231321123223331211111131211113313331333132313331333112233232112233121313222   >>