const fi='songuyen.txt'
fo='soduong.out'
var f1,f2:text;
a:array[1..100]of integer;
i,n:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
n:=0;
while not eof(f1) do
begin
inc(n);
read(f1,a[n]);
end;
for i:=1 to n do
if a[i]>0 then write(f2,a[i]:4);
close(f1);
close(f2);
end.