procedure TForm1.btn1Click(Sender: TObject);
var
a, b, c: Integer;
begin
mmo1.Clear ;
for a := 97 to 120 do
begin
for b := (a + 1) to 121 do
begin
for c := (b + 1) to 122 do
begin
mmo1.Lines.Add(chr(a) + '-' + chr(b) + '-' + chr(c));
end;
end;
end;
end;