C312312111111331312111133133313331333131331123313331323223313123231   >>    C31231211111133131211113313331333133313133112331333132322331312323   <<    C312312111111331312111133133313331333131331123313331323223313123233   >>      C312312111111331312111133133313331333131331123313331323223313123232   >>