C1111133313331323223313331333133313311211111211331323133313112123121121   >>    C111113331333132322331333133313331331121111121133132313331311212312112   <<    C1111133313331323223313331333133313311211111211331323133313112123121123   >>      C1111133313331323223313331333133313311211111211331323133313112123121122   >>