trabajador : (1, 3, s)
s: 	

X1 := X1 + 1;
X1 := X1 + 1;
X2 := X1 + 1;
while X2 != 0 do
	X3 := X1 + 1;
	while X3 != 0 do
		X1 := X1 + 1;
		X3 := X3 - 1
	od;
	X2 := X2 - 1
od
