print "label";
for $id (1 .. 10) { print "\tp$id"; }
for $id (1 .. 10) { print "\tr$id"; }
print "\n";

#for $id (1 .. 10) {
	$cmd = "cat used.txt | sed -e 's/^/python scripts\\/chrono_knn.py /' | sh";
	#print "$cmd\n";
	print `$cmd`;
#}