diff --git a/count/count.py b/count/count.py
new file mode 100644
index 0000000..484f53f
--- /dev/null
+++ b/count/count.py
@@ -0,0 +1,20 @@
+import re
+from collections import defaultdict
+
+
+def count_words_v1(sentence):
+    count = defaultdict(int)
+    for word in sentence.split():
+        count[word.lower()] += 1
+    return count
+
+
+def count_words_v2(sentence):
+    regex = r"[\w|']+"
+    count = defaultdict(int)
+    for word in re.findall(regex, sentence):
+        count[word.lower()] += 1
+    return count
+
+
+count_words = count_words_v2
diff --git a/count/test_count.py b/count/test_count.py
new file mode 100644
index 0000000..f7eeb96
--- /dev/null
+++ b/count/test_count.py
@@ -0,0 +1,37 @@
+import unittest
+
+
+from count import count_words
+
+
+class CountWordsTests(unittest.TestCase):
+
+    """Tests for count_words."""
+
+    def test_simple_sentence(self):
+        actual = count_words("oh what a day what a lovely day")
+        expected = {"oh": 1, "what": 2, "a": 2, "day": 2, "lovely": 1}
+        self.assertEqual(actual, expected)
+
+    def test_apostrophe(self):
+        actual = count_words("don't stop believing")
+        expected = {"don't": 1, "stop": 1, "believing": 1}
+        self.assertEqual(actual, expected)
+
+    # To test the Bonus part of this exercise, comment out the following line
+    # @unittest.expectedFailure
+    def test_capitalization(self):
+        actual = count_words("Oh what a day what a lovely day")
+        expected = {"oh": 1, "what": 2, "a": 2, "day": 2, "lovely": 1}
+        self.assertEqual(actual, expected)
+
+    # To test the Bonus part of this exercise, comment out the following line
+    # @unittest.expectedFailure
+    def test_symbols(self):
+        actual = count_words("¿Te gusta Python?")
+        expected = {"te": 1, "gusta": 1, "python": 1}
+        self.assertEqual(actual, expected)
+
+
+if __name__ == "__main__":
+    unittest.main(verbosity=2)