Update Exercises Directory Names to Reflect Order

exercises/15_traits/traits5.rs

@@ -0,0 +1,40 @@
+// traits5.rs
+//
+// Your task is to replace the '??' sections so the code compiles.
+//
+// Don't change any line other than the marked one.
+//
+// Execute `rustlings hint traits5` or use the `hint` watch subcommand for a
+// hint.
+
+// I AM NOT DONE
+
+pub trait SomeTrait {
+    fn some_function(&self) -> bool {
+        true
+    }
+}
+
+pub trait OtherTrait {
+    fn other_function(&self) -> bool {
+        true
+    }
+}
+
+struct SomeStruct {}
+struct OtherStruct {}
+
+impl SomeTrait for SomeStruct {}
+impl OtherTrait for SomeStruct {}
+impl SomeTrait for OtherStruct {}
+impl OtherTrait for OtherStruct {}
+
+// YOU MAY ONLY CHANGE THE NEXT LINE
+fn some_func(item: ??) -> bool {
+    item.some_function() && item.other_function()
+}
+
+fn main() {
+    some_func(SomeStruct {});
+    some_func(OtherStruct {});
+}