list1 = ["AA1", "AA2","AA", "AA+"]
list2 = ["AA1", "AA2","AA+", "AA"]
re1 = Regexp.union(list1)
re2 = Regexp.union(list2)
puts re1
puts re2
results1 = "somethin with AA+ in it".scan(re1)
results2 = "somethin with AA+ in it".scan(re2)
puts results1
puts results2