C312312111111331312111133133313331322331333133313331333131133133313232213121   >>    C31231211111133131211113313331333132233133313331333133313113313331323221312   <<    C312312111111331312111133133313331322331333133313331333131133133313232213123   >>      C312312111111331312111133133313331322331333133313331333131133133313232213122   >>