var 
  //s:ansistring;
  i,count,s,g,a,b,c,n:longint;
begin
  readln(a,b,c);
  if (a+b+c)/3>=90 then writeln('beijing')
  else writeln('nanjing');
end.
/**************************************************************
	Problem: 1626
	User: admin
	Language: Pascal
	Result: Wrong Answer
****************************************************************/