uses crt;
var f,f1:text;
i,a,b:integer;
begin
clrscr;
readln(a);
Readln(b);
assign(f,'file1.txt');
rewrite(f);
For i:=a to b do writeln(f,i);
reset(f);
assign(f1,'file2.txt');
rewrite(f1);
while not(EOF(F)) do
begin
readln(f,i); if i<0 then writeln(f1,i);
end;
close(f1);
reset(f);
assign(f1,'file3.txt');
rewrite(f1);
while not(EOF(F)) do
begin
readln(f,i); if i>0 then writeln(f1,i);
end;
close(f1);
close(f);
assign(f1,'file4.txt');
rewrite(f1);
write(f1,0);
close(f1);
end.