uses crt;
var
n, k1, k2, del, rez: integer;
begin
writeln('1 shislo');
readln(k1);
writeln('2 shislo');
readln(k2);
for n := k1 to k2 do
begin
if n > 1 then
begin
del := 2;
repeat
rez := n mod del;
if rez <> 0 then
del := del + 1;
until rez = 0;
end;
if n = del then
write(n:3);
end;
readln;
end.