>re.pl 1
olive&(popeye|bluto)
^((?=.*\b(olive)\b)((?=.*\b(popeye)\b)|(?=.*\b(bluto)\b)))
----
popeye,olive

>re.pl 2
(tom&jerry)|(sylvester&tweety)
^(((?=.*\b(tom)\b)(?=.*\b(jerry)\b))|((?=.*\b(sylvester)\b)(?=.*\b(tweety)\b)))
----
tom,jerry
jerry,tom
sylvester,tweety

>re.pl 3
moe&(shemp|curly|joe)&larry
^((?=.*\b(moe)\b)((?=.*\b(shemp)\b)|(?=.*\b(curly)\b)|(?=.*\b(joe)\b))(?=.*\b(larry)\b))
----
larry,curly,moe