#include<iostream>
#include<cmath>
#include "stdio.h"
#define pi 3.1415
using namespace std;
int main()
{
int num;
float x,y,s=50,r0,r,j=1,k;

cin>>num;
for(int i=1;i<=num;i++)
{
cin>>x>>y;
for(int k=1;;k++)
{
r=sqrt(x*x+y*y);
r0=sqrt(k*100/pi);
if(r0>r)
{
cout<<"Property "<<j++<<": This property will begin eroding in year "
    <<k<<"."<<endl;
 break;
}
}
}
cout<<"END OF OUTPUT"<<endl;
return 0;
}