C1231321123223331211111131211113313331333132313331333112233232112223221221   >>    C123132112322333121111113121111331333133313231333133311223323211222322122   <<    C1231321123223331211111131211113313331333132313331333112233232112223221223   >>      C1231321123223331211111131211113313331333132313331333112233232112223221222   >>