C1111133313331323223313331333133313311211111211331333131211111211113321222121   >>    C111113331333132322331333133313331331121111121133133313121111121111332122212   <<    C1111133313331323223313331333133313311211111211331333131211111211113321222123   >>      C1111133313331323223313331333133313311211111211331333131211111211113321222122   >>