begin 

    comment lib 1;

    integer 
        s;
    procedure p(f, g);
        procedure 
            f,
            g;
        begin 
        integer 
            x;
        procedure r(f, g);

        procedure f, g;
            begin 
            outreal(1, s);
            outreal(1, x)
            end;

        s := s + 1;
        x := s;
        if s = 1 then 
            p(f, r)
        else 
            f(g, r)
        end p;

    procedure q(f, g);
        procedure 
            f,
            g;
        begin 

    f( q, q );
    g( q, q)
        end q;

    s := 0;
    p(q, p);
end