program z11_2;
const n=10;
var a:array[1..n] of integer;
i,x:integer;
begin
randomize;
for i:=1 to n do
begin a[i]:=random(40);
write(a[i]:3);end;
readln(x);
for i:=1 to n do if x=a[i] then x:=0;
if x=0 then writeln('est')
else writeln('net');end.