diff --git a/MSKIM/31to40/39.py b/MSKIM/31to40/39.py
new file mode 100644
index 0000000..d363ac3
--- /dev/null
+++ b/MSKIM/31to40/39.py
@@ -0,0 +1,35 @@
+from collections import deque
+
+def solution(graph, start):
+    adj_list = {}  #
+    for u, v in graph:
+        if u in adj_list:
+            adj_list[u].append(v)
+        else:
+            adj_list[u] = [v]
+
+
+    def bfs(start):
+        visited = set()
+        queue = deque([start])
+        visited.add(start)
+        result = [start]
+
+        while queue:
+            node = queue.popleft()
+            if node in adj_list:
+                for neighbor in adj_list[node]:
+                    if neighbor not in visited:
+                        queue.append(neighbor)
+                        visited.add(neighbor)
+                        result.append(neighbor)
+
+        return result
+
+    return bfs(start)
+
+
+graph = [['A', 'B'], ['A', 'C'], ['B', 'D'], ['B', 'E'], ['C', 'F'], ['E', 'F']]
+start_node = 'A'
+
+print(solution(graph, start_node))