C1231321123223331211111131211113313331333132313331333112233232112212232223111   >>    C123132112322333121111113121111331333133313231333133311223323211221223222311   <<    C1231321123223331211111131211113313331333132313331333112233232112212232223113   >>      C1231321123223331211111131211113313331333132313331333112233232112212232223112   >>