#include <cstdlib>
#include <iostream>
#define pi 3.14
#define d 0.0193

using namespace std;
int a, b, x, n;
float V, P, r, k;
int main(int argc, char *argv[])
{
 	 int lol = 0;
    while(cin >> a >> b >> x >> n)
    {
	  			  lol == 1 ? printf("\n", "") : lol = 1;
	  			  if(b > 0 && a > 0 && a > b && x > 0)
	  			  {
				  		 r = b;
				  		 r /= 2*pi;
				  		 P = pi*r*r;
				  		 V = P * a;
				  		 k = V * d * x;
				  		 if(n >= k) cout << "TAK";
				  		 else cout << "NIE";
 		 		  }
 		 		  else cout << "BRAK";
	 }
}