Program r8_42;
uses crt;
const n=5;
var a:array[1..n,1..n]of integer;
      i,j:integer;
      h:boolean;
BEGIN
clrscr;
randomize;
for i:=1 to n do begin
 for j:=1 to n do begin;
  a[i,j]:=random(50)-20;
 write(a[i,j]:4);
 end;
writeln;
end;
h:=false;
for i:= 1 to n do begin
 for j:=1 to n do begin
   if a[i,j]<0 then h:=true
   else h:=false;
 end;
end;
if h=true then writeln('est')
else writeln('net');
END.