diff --git a/Week03/sequences_muhammet_topcu.py b/Week03/sequences_muhammet_topcu.py
new file mode 100644
index 00000000..e14b2ac4
--- /dev/null
+++ b/Week03/sequences_muhammet_topcu.py
@@ -0,0 +1,13 @@
+from collections import Counter
+
+def remove_duplicates(lst):
+    return list(dict.fromkeys(lst))
+
+def list_counts(lst):
+    return dict(Counter(lst))
+
+def reverse_dict(d):
+    result = {}
+    for k, v in d.items():
+        result[v] = result.get(v, 0) + k
+    return result