#include<iostream>
using namespace std;
int main()
{
    int N,i,j;
    cin>>N;
    
    float x[50],y[50],s;
    for(i=0;i<N;i++)
    {
          cin>>x[i]>>y[i];
    }
    for(i=0;i<N;i++)
    {
       s=0.0;
       j=0;
       while((x[i]*x[i]+y[i]*y[i])*3.14>2*s)
       {
          s=s+50;
          j++;
       }
       cout<<"Property "<<i+1<<": This property will begin eroding in year "<< j<<"."<<endl;
    }
    cout<<"END OF OUTPUT"<<endl;
  return 0;
}