[chaley]

This seems to work. You will need to uncomment line 5 and line 14. After that you should delete line 13 and lines 1-4, which are there so I can test the template.

program:
#	show = 'Criminal Minds, Law and Order';
#	show = 'Pretty Little Liars, Law and Order, Supergirl';
	show = 'Criminal Minds, Law and Order, Supergirl';
#	show = $#show;

	show1 = '^Criminal Minds$' inlist show && '^Law and Order$' inlist show;
	show2 = '^Pretty Little Liars$' inlist show && '^Law and Order$' inlist show;
	show3 = '^Supergirl$' inlist show && '^Law and Order$' inlist show;

	output = '';

	ao3tags_pair = 'Alex / Emily, Olivia / Alex';
#	ao3tags_pair = $#ao3tags_pair;

	for item in ao3tags_pair:
		ni = '';

		if show1 then
			if item ==  "Alex / Emily" then
				ni = "Emily Prentiss / Alex Cabot"
			fi
		fi;

		if show2 then
			if item ==  "Alex / Emily" then
				ni = "Emily Fields / Alex Cabot"
			fi
		fi;

		if show3 then
			if item ==  "Olivia / Alex" then
				ni = "Alex Danvers / Olivia Benson"
			fi
		fi;


		if ni then
			output = output & ',' & ni 
		else
			output = output & ',' & item
		fi
	rof;
	output = list_sort(list_remove_duplicates(output, ','), 0, ',')