#include <iostream>
#include <cmath>
using namespace std;
int main()
{
	int n,m=0;
	float x,y,r,sum;
	cin>>n;
	for(int i=0;i<n;i++)
	{
		cin>>x>>y;
	    r=sqrt(x*x+y*y);
		sum=3.14*r*r/2;
		while(sum>0)
		{
			sum=sum-50;
			m++;
		}
		cout<<"Property "<<i+1<<": This property will begin eroding in year "<<m<<"."<<endl;
		m=0;

	}
	cout<<"END OF OUTPUT."<<endl;
	return 0;
}