C1111233131211111211113313331333133313311211111333133313331311223221   >>    C111123313121111121111331333133313331331121111133313331333131122322   <<    C1111233131211111211113313331333133313311211111333133313331311223223   >>      C1111233131211111211113313331333133313311211111333133313331311223222   >>