PBb

#include <iostream>
#include <math.h>
using namespace std;


int main(){

long  a,b,c;
float mg;
cin>>a>>b;
c=b;
while (a!=0&&b!=0&&c!=0)
{
 cin>>c;
  mg=sqrt(a*b);
  if (mg==c)
        cout<<a<<" "<<b<<" "<<c;
   a=b;
   b=c;
}
   return 0;
}