diff --git a/src/de/dhbwstuttgart/typeinference/EinzelElement.java b/src/de/dhbwstuttgart/typeinference/EinzelElement.java
new file mode 100644
index 00000000..58f4970d
--- /dev/null
+++ b/src/de/dhbwstuttgart/typeinference/EinzelElement.java
@@ -0,0 +1,33 @@
+package de.dhbwstuttgart.typeinference;
+
+import com.rits.cloning.Cloner;
+
+public class EinzelElement<A> implements KomplexeMenge<A>{
+	private A item;
+	
+	public EinzelElement(A element){
+		item = element;
+	}
+
+	public Menge<KomplexeMenge<A>> getSet(){
+		Menge<KomplexeMenge<A>> ret = new Menge<>();
+		ret.add(this);
+		return ret;
+	}
+
+	@Override
+	public Menge<Menge<A>> cartesianProduct() {
+		Cloner cloner = new Cloner();
+		Menge<Menge<A>> ret = new Menge<>();
+		Menge<A> i = new Menge<A>();
+		i.add(cloner.deepClone(item));
+		ret.add(i);
+		return ret;
+	}
+
+	@Override
+	public String toString(){
+		return item.toString();
+	}
+	
+}
\ No newline at end of file
diff --git a/src/de/dhbwstuttgart/typeinference/KomplexeMenge.java b/src/de/dhbwstuttgart/typeinference/KomplexeMenge.java
new file mode 100644
index 00000000..25ca29e8
--- /dev/null
+++ b/src/de/dhbwstuttgart/typeinference/KomplexeMenge.java
@@ -0,0 +1,6 @@
+package de.dhbwstuttgart.typeinference;
+
+public interface KomplexeMenge<A>{
+	Menge<? extends KomplexeMenge<A>> getSet();
+	Menge<Menge<A>> cartesianProduct();
+}
\ No newline at end of file
diff --git a/test/plugindevelopment/TypeInsertTests/LambdaTest28.jav b/test/plugindevelopment/TypeInsertTests/LambdaTest28.jav
new file mode 100644
index 00000000..c91288ab
--- /dev/null
+++ b/test/plugindevelopment/TypeInsertTests/LambdaTest28.jav
@@ -0,0 +1,11 @@
+class Klasse{
+	main(param){
+		return param.methode();
+	}
+}
+
+class Klasse1{
+	<A> A methode(){
+		return null;
+	}
+}
diff --git a/test/plugindevelopment/TypeInsertTests/LambdaTest28.java b/test/plugindevelopment/TypeInsertTests/LambdaTest28.java
new file mode 100644
index 00000000..ae9353a9
--- /dev/null
+++ b/test/plugindevelopment/TypeInsertTests/LambdaTest28.java
@@ -0,0 +1,18 @@
+package plugindevelopment.TypeInsertTests;
+
+import de.dhbwstuttgart.typeinference.Menge;
+
+import org.junit.Test;
+
+public class LambdaTest28 {
+
+	private static final String TEST_FILE = "LambdaTest28.jav";
+	
+	@Test
+	public void run(){
+		Menge<String> mustContain = new Menge<String>();
+		//mustContain.add("A a");
+		MultipleTypesInsertTester.test(this.TEST_FILE, mustContain);
+	}
+	
+}