diff --git a/10/graph.hpp b/10/graph.hpp
index a15b2ac..66dc392 100644
--- a/10/graph.hpp
+++ b/10/graph.hpp
@@ -26,8 +26,8 @@ class function_graph {
         size_t indegree;
     };
 
-    using edge = std::pair<function, function>;
     using data_ptr = std::shared_ptr<group_data>;
+    using edge = std::pair<function, function>;
     using group_edge = std::pair<group_id, group_id>;
 
     std::map<function, std::set<function>> adjacency_lists;