C1231321123223331211111131211113313331333132313331333112233232113312123323211   >>    C123132112322333121111113121111331333133313231333133311223323211331212332321   <<    C1231321123223331211111131211113313331333132313331333112233232113312123323213   >>      C1231321123223331211111131211113313331333132313331333112233232113312123323212   >>