C1231321123223331211111131211113313331333132313331333112233232121213232221   >>    C123132112322333121111113121111331333133313231333133311223323212121323222   <<    C1231321123223331211111131211113313331333132313331333112233232121213232223   >>      C1231321123223331211111131211113313331333132313331333112233232121213232222   >>