C1111233131211111211113313331333133313331333133313331311331323132322231121   >>    C111123313121111121111331333133313331333133313331333131133132313232223112   <<    C1111233131211111211113313331333133313331333133313331311331323132322231123   >>      C1111233131211111211113313331333133313331333133313331311331323132322231122   >>