diff --git a/Week03/sequences_abdulsamet_kucuk.py b/Week03/sequences_abdulsamet_kucuk.py
new file mode 100644
index 00000000..4b082d91
--- /dev/null
+++ b/Week03/sequences_abdulsamet_kucuk.py
@@ -0,0 +1,19 @@
+def remove_duplicates(lst):
+    result = []
+    seen = set()
+    for x in lst:
+        if x not in seen:
+            seen.add(x)
+            result.append(x)
+    return result
+
+
+def list_counts(lst):
+    counts = {}
+    for x in lst:
+        counts[x] = counts.get(x, 0) + 1
+    return counts
+
+
+def reverse_dict(d):
+    return {v: k for k, v in d.items()}