C1231321123223331211111131211113313331333132313331333112233232112123112221   >>    C123132112322333121111113121111331333133313231333133311223323211212311222   <<    C1231321123223331211111131211113313331333132313331333112233232112123112223   >>      C1231321123223331211111131211113313331333132313331333112233232112123112222   >>