struct a b c d end;

method inc()
       this.a := this.a - -1;
       this.b := this.b - -1;
       this.c := this.c - -1;
       this.d := this.d - -1;
       return this.a;
end;

method m(ar)
	5;
	20 - ar.inc() - 70;
	inc();
	ar.inc();
	20 * inc();
	20 * (5 - 4 - (4 * ((5 or 6) < ar.inc())));
	inc() * 20;
	(((ar.inc() < (5 or 6)) *4) - 4 - 5) * 20;

	15 * (ar.inc() < (5 -inc()));
	ar.inc() < inc();

	inc(4-5);	
	(((ar.inc(4-5,6*4,5<5) < (5 or 6)) *4) - 4 - 5) * 20;
	return 0;
end;