diff --git a/Week03/sequences_zeynepnur_erten.py b/Week03/sequences_zeynepnur_erten.py
new file mode 100644
index 00000000..fb91b74e
--- /dev/null
+++ b/Week03/sequences_zeynepnur_erten.py
@@ -0,0 +1,23 @@
+def remove_duplicates( seq:list ) -> list:
+  new_list = []
+  for i in seq:
+    if i not in new_list:
+      new_list.append(i)
+
+  return new_list
+  
+
+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:
+  new_d = {}
+  for k, v in d.items():
+    new_d[v] = k 
+  return new_d