diff --git a/src/05_OO/b/Testat/main_mp4_OO_b.cpp b/src/05_OO/b/Testat/main_mp4_OO_b.cpp
index 25160e8..3a4178a 100644
--- a/src/05_OO/b/Testat/main_mp4_OO_b.cpp
+++ b/src/05_OO/b/Testat/main_mp4_OO_b.cpp
@@ -153,26 +153,50 @@ bool HeapObject::assertionsHold(){
 }
 
 
-class K : public HeapObject
-{
+class K : public HeapObject {
+private:
+    A a;
 public:
-  K(){std::cout << "+K ";}
+    K(){std::cout << "+K ";}
     ~K(){std::cout << "-K ";}
 };
 
-class L {
+class K2 : public HeapObject {
+private:
+    A a;
 public:
-  L(){std::cout << "+L ";}
-  ~L(){std::cout << "-L ";}
+    K2(){
+        B b;
+        std::cout << "+K ";}
+    ~K2(){std::cout << "-K ";}
 };
 
-
-class M {
+class M : public K{
 public:
-    M(){std::cout << "+M ";}
+    M(){
+        {
+            B b;
+        }
+        std::cout << "+M ";
+    }
     ~M(){std::cout << "-M ";}
 };
 
+class L : public M{
+public:
+    L(){std::cout << "+L ";}
+    ~L(){std::cout << "-L ";}
+};
+
+void mod5() {
+    L *p = new L();
+    delete p;
+}
+
+void testat() {
+    K2 k2;
+}
+
 
 
 int main(int argc, const char * argv[]) {
@@ -191,6 +215,10 @@ int main(int argc, const char * argv[]) {
 
   HeapObject::assertionsHold();
   std::cout << " ENDE" << std::endl;
+  mod5();
+  std::cout << std::endl;
+  testat();
+
   return 0;
 }