BEGIN
    BEGIN
        a := 0;
        b := 0;
        c := 0;
        d := 0;
        e := 0;
        f := a + b + c + d + e;
    END;

    BEGIN
        alpha := 10;
        beta := 20
    END;

    gamma := 30;

    BEGIN
        alpha  := -88; 
        beta   := 99;
        result := alpha + 3/(beta - gamma) + 5;
    END
END.
