C1111133313331323223313331333133313113313231331121111113313112211231   >>    C111113331333132322331333133313331311331323133112111111331311221123   <<    C1111133313331323223313331333133313113313231331121111113313112211233   >>      C1111133313331323223313331333133313113313231331121111113313112211232   >>