diff --git a/Week03/sequences_elif_yalvac.py b/Week03/sequences_elif_yalvac.py
new file mode 100644
index 00000000..a0ec0a80
--- /dev/null
+++ b/Week03/sequences_elif_yalvac.py
@@ -0,0 +1,15 @@
+def remove_duplicates(seq: list) -> list:
+    return list(set(seq))
+
+
+def list_counts(seq: list) -> dict:
+    from collections import Counter
+    return dict(Counter(seq))
+
+
+def reverse_dict(d: dict) -> dict:
+    from collections import defaultdict
+    rev = defaultdict(list)
+    for k, v in d.items():
+        rev[v].append(k)
+    return dict(rev)