C13223313311212111133133313331333133313231323133212111133312121   >>    C1322331331121211113313331333133313331323132313321211113331212   <<    C13223313311212111133133313331333133313231323133212111133312123   >>      C13223313311212111133133313331333133313231323133212111133312122   >>