C1111233131211111211113313331333133313211231211111133132322333121   >>    C111123313121111121111331333133313331321123121111113313232233312   <<    C1111233131211111211113313331333133313211231211111133132322333123   >>      C1111233131211111211113313331333133313211231211111133132322333122   >>