program mn;
uses crt;
var x,y:longint;
BEGIN ClrScr;
Write('x,y:');readln(x,y);
if (x<=6)and(x>=-4)and(y<=5)and(y>=-3)and(sqr(x)+sqr(y)>=4) then writeln('da') else writeln('net');
readln;
END.