diff --git a/Week03/sequence_zeynepsude_bayram.py b/Week03/sequence_zeynepsude_bayram.py
new file mode 100644
index 0000000..3f0b9ef
--- /dev/null
+++ b/Week03/sequence_zeynepsude_bayram.py
@@ -0,0 +1,21 @@
+from typing import Any, Dict, List
+
+def remove_duplicates(seq: List[Any]) -> List[Any]:
+    out, seen = [], set()
+    for x in seq:
+        if x not in seen:
+            seen.add(x)
+            out.append(x)
+    return out
+
+def list_counts(seq: List[Any]) -> Dict[Any, int]:
+    counts: Dict[Any, int] = {}
+    for x in seq:
+        counts[x] = counts.get(x, 0) + 1
+    return counts
+
+def reverse_dict(d: Dict[Any, Any]) -> Dict[Any, List[Any]]:
+    rev: Dict[Any, List[Any]] = {}
+    for k, v in d.items():
+        rev.setdefault(v, []).append(k)
+    return rev