C1231321123223331211111131211113313331333132313331333112233232113312212312211   >>    C123132112322333121111113121111331333133313231333133311223323211331221231221   <<    C1231321123223331211111131211113313331333132313331333112233232113312212312213   >>      C1231321123223331211111131211113313331333132313331333112233232113312212312212   >>