#include<bits/stdc++.h>
#define pi 3.1415926
using namespace std;
int main(){
int n;
cin>>n;
double x,y;
double d,r;
int flag=0;
while(n--){
cin>>x>>y;
d = sqrt(x*x+y*y);
for(int j=1;;j++){
r = sqrt(100.0*j/pi);
if(r>d) {flag++;printf("Property %d: This property will begin eroding in year %d.\n",flag,j);break;}
}
}
printf("END OF OUTPUT.");
return 0;
}