readln(input);
    val(input, info, klaida);

    if klaida = 1
    then writeln('Jus ivedete ne skaiciu, prasome ivesti skaiciu')
    else
    if (klaida = 0) and (input <> 'stop') then
    begin
        new(element);
        element^.info := info;
        pradzia := element;
        pabaiga := element;
        element^.next := nil;
        element^.previous := nil;
        kiekis := kiekis + 1;
        element^.key := kiekis;
    end;

    while input <> 'stop' do
    begin
        writeln('Iveskite ', kiekis + 1,'-aji saraso elementa. Noredami nutraukti ivedima, rasykite ''stop''');
        readln(input);
        val(input, info, klaida);
        if klaida = 0 then
        begin
            if kiekis >= 1 then
            begin
                new(element);
                element^.previous := pabaiga;
                pabaiga^.next := element;
                pabaiga := element;
                element^.info := info;
                kiekis := kiekis + 1;
                element^.key := kiekis;
            end;

            if (klaida = 1) and (input <> 'stop')
            then writeln('Jus ivedete ne skaiciu, prasome ivesti skaiciu');
        end;
    end;
    pradzia^.previous := nil;