diff --git a/src/05_OO/b/MP/main_mp4_OO_b.cpp b/src/05_OO/b/MP/main_mp4_OO_b.cpp
index 907263c..cf8412a 100644
--- a/src/05_OO/b/MP/main_mp4_OO_b.cpp
+++ b/src/05_OO/b/MP/main_mp4_OO_b.cpp
@@ -152,27 +152,27 @@ bool HeapObject::assertionsHold(){
     return true;
 }
 
-
 class K : public HeapObject
 {
 public:
-  K(){std::cout << "+K ";}
+    K(){std::cout << "+K ";}
     ~K(){std::cout << "-K ";}
 };
 
-class L {
+class M : public K{
+public:
+    //B b; für Modifikation 5 einkommentieren
+    M(){std::cout << "+M ";}
+    ~M(){std::cout << "-M ";}
+};
+
+class L : public M{
 public:
   L(){std::cout << "+L ";}
   ~L(){std::cout << "-L ";}
 };
 
 
-class M {
-public:
-    M(){std::cout << "+M ";}
-    ~M(){std::cout << "-M ";}
-};
-
 void pattern1() {
     B b;
     {
@@ -187,6 +187,11 @@ void pattern2() {
    A a;
 }
 
+B AtoB(A &a) {
+    B &b = reinterpret_cast<B &>(a);
+    return b;
+}
+
 void pattern3() {
     A a1;
     {
@@ -194,6 +199,8 @@ void pattern3() {
         {
             B b;
         }
+    }
+    {
         C c;
     }
 }
@@ -222,6 +229,9 @@ int main(int argc, const char * argv[]) {
   pattern2();
   std::cout << std::endl;
   pattern3();
+  std::cout << std::endl;
+  L *p = new L();
+  delete p;
 
   return 0;
 }