C1111233131211111211113313331333133313331333133313331311331323221223231   >>    C111123313121111121111331333133313331333133313331333131133132322122323   <<    C1111233131211111211113313331333133313331333133313331311331323221223233   >>      C1111233131211111211113313331333133313331333133313331311331323221223232   >>