diff --git a/data_structures/hash_table/uncommon_words.rb b/data_structures/hash_table/uncommon_words.rb
index e3e8d2f..9e17b61 100644
--- a/data_structures/hash_table/uncommon_words.rb
+++ b/data_structures/hash_table/uncommon_words.rb
@@ -45,4 +45,8 @@ def find_uncommon_words(strA, strB)
   result
 end
 
-puts find_uncommon_words("this apple is sweet", "this apple is sour")
\ No newline at end of file
+puts find_uncommon_words("this apple is sweet", "this apple is sour")
+# => ["sweet", "sour"]
+
+puts find_uncommon_words("apple apple", "banana")
+# => ["banana"]
\ No newline at end of file