Algorithm Math Delphi

Title: create speakable random passwords?
function SpeakAblePassWord: string;
const
conso: array [0..19] of Char = ('b', 'c', 'd', 'f', 'g', 'h', 'j',
'k', 'l', 'm', 'n', 'p', 'r', 's', 't', 'v', 'w', 'x', 'y', 'z');
vocal: array [0..4] of Char = ('a', 'e', 'i', 'o', 'u');
var
i: Integer;
begin
Result := '';
//randomize;
for i := 1 to 4 do
begin
Result := Result + conso[Random(19)];
Result := Result + vocal[Random(4)];
end;
end;