{ Petri net generated by APT for net exercise 2.4 net solution }

PLACE
s11, s12, s21, s31, s32;

MARKING
	s21	: 1;

TRANSITION t1
CONSUME
	s12	: 1,
	s11	: 1;
PRODUCE
	s21	: 1;

TRANSITION t2
CONSUME
	s21	: 1;
PRODUCE
	s31	: 1,
	s32	: 1;

TRANSITION t3
CONSUME
	s31	: 1;
PRODUCE
	s11	: 1;

TRANSITION ts11
CONSUME
	s11	: 1;
PRODUCE
	s12	: 1;

TRANSITION ts12
CONSUME
	s12	: 1;
PRODUCE
	s11	: 1;

TRANSITION ts21
CONSUME
	s21	: 1;
PRODUCE
	s21	: 1;

TRANSITION ts31
CONSUME
	s31	: 1;
PRODUCE
	s32	: 1;

TRANSITION ts32
CONSUME
	s32	: 1;
PRODUCE
	s31	: 1;