C13223313311212111133133313331333133313233231323223313233313121   >>    C1322331331121211113313331333133313331323323132322331323331312   <<    C13223313311212111133133313331333133313233231323223313233313123   >>      C13223313311212111133133313331333133313233231323223313233313122   >>