var f1,f2:text;
s:string;
i:integer;
procedure npuce(var t1,t2:text);
begin
reset(t2);
rewrite(t1);
while not eof(t2) do
begin
readln(t2,s);
if s<>'' then writeln(t1,s);
end;
close(t1);
close(t2);
end;
begin
assign(f2,'data.txt');
assign(f1,'result.txt');
npuce(f1,f2);
end.