method fo0(a b c d)
	var x := g();
	/*return a-b-c-d-x; */
	return b;
end;
method g()
	h();
	return -100;
end;
method h()
	var q := 0;
	var w := 0;
	var e := 0;
	var r := 0;
	var t := 0;
	return (q*w)-(e*r)-t;
end;