each: 	1 at d:/exp/pm_closure.pl line 10.
each: 	2 at d:/exp/pm_closure.pl line 10.
each: 	3 at d:/exp/pm_closure.pl line 10.
cfor: 	4 at d:/exp/pm_closure.pl line 21.
cfor: 	4 at d:/exp/pm_closure.pl line 21.
cfor: 	4 at d:/exp/pm_closure.pl line 21.
gen: 	1 at d:/exp/pm_closure.pl line 31.
gen: 	2 at d:/exp/pm_closure.pl line 31.
gen: 	3 at d:/exp/pm_closure.pl line 31.