program persegibintang1;
var a,b,c : integer;
begin
readln(a);
for b:= 1 to a do
begin
for c := 1 to a do
begin
if((b=1) or (b=a) or (c=1) or (c=a)) then
write('*')
else
write(' ');
end;
writeln;
end;
readln;
end.
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