#include <stdio.h>
#include <math.h>
#define PI 3.1415926
int get_year(double x, double y);
int main(void) {
int n;
int i = 0;
double x, y;
scanf("%d", &n);
while (i < n) {
i++;
scanf("%lf%lf", &x, &y);
printf("Property %d: This property will begin eroding in year %d.\n",
i, get_year(x, y));
}
printf("END OF OUTPUT.\n");
return 0;
}
int get_year(double x, double y) {
int i = 0;
double r = 0.0;
double s = 0.0;
double v = x * x + y * y;
while (v > r * r) {
s += 50;
r = sqrt(2 * s / PI);
i++;
}
return i;
}