C1231321123223331211111131211113313331333132322131213223222121211   >>    C123132112322333121111113121111331333133313232213121322322212121   <<    C1231321123223331211111131211113313331333132322131213223222121213   >>      C1231321123223331211111131211113313331333132322131213223222121212   >>