diff --git a/Week03/sequences_aycaselda_keskin.py b/Week03/sequences_aycaselda_keskin.py
new file mode 100644
index 00000000..42587f32
--- /dev/null
+++ b/Week03/sequences_aycaselda_keskin.py
@@ -0,0 +1,21 @@
+def remove_duplicates(seq: list) -> list:
+
+    return list(set(seq))
+
+def list_counts(seq: list) -> dict:
+
+    counts_dict = {} 
+    
+    for item in seq:
+        counts_dict[item] = seq.count(item) 
+        
+    return counts_dict
+
+def reverse_dict(d: dict) -> dict:
+
+    reversed_d = {} 
+    for k, v in d.items():
+        
+      reversed_d[v] = k 
+        
+    return reversed_d