diff --git a/Week03/sequences_buse_demirbas.py b/Week03/sequences_buse_demirbas.py
new file mode 100644
index 00000000..31a4dc1c
--- /dev/null
+++ b/Week03/sequences_buse_demirbas.py
@@ -0,0 +1,13 @@
+def remove_duplicates(seq : list) -> list:
+    new_items = set(seq)
+    return list(new_items)
+def list_counts(seq : list) -> dict:
+    counts = {}
+    for item in seq:
+        counts[item] = counts.get(item , 0) +1
+        return counts
+def reverse_dict(d : dict) -> dict:     
+    result = {}
+    for key , value in d.items():
+        result[value] = key
+    return result