diff --git a/u4/word_count.py b/u4/word_count.py
new file mode 100644
index 0000000..5fc92dc
--- /dev/null
+++ b/u4/word_count.py
@@ -0,0 +1,20 @@
+def count_word(sentence):
+    words = []
+    word = ""
+
+    for character in sentence:
+        if character.isalnum() or character == " ":
+            word += character.lower()
+        else:
+            if word.strip("'"):
+                words.append(words.strip("'"))
+            word = ""
+    if word.strip("'"):
+        words.append(word.strip("'"))
+
+        result = {}
+
+    for word in words:
+        result[word] = result.get(word, 0) + 1
+
+        return result