C1111133313331323223313331333133313311211111211331311331323212121   >>    C111113331333132322331333133313331331121111121133131133132321212   <<    C1111133313331323223313331333133313311211111211331311331323212123   >>      C1111133313331323223313331333133313311211111211331311331323212122   >>