diff --git a/src/com/imegumii/Main.java b/src/com/imegumii/Main.java
index f67e1c9..d1b5549 100644
--- a/src/com/imegumii/Main.java
+++ b/src/com/imegumii/Main.java
@@ -99,9 +99,7 @@ public class Main {
 
     }
 
-
-    public static void Thompson()
-    {
+    public static void Thompson() {
         RegExp expr1 = new RegExp("a");
         RegExp expr2 = new RegExp("b");
         RegExp expr3 = new RegExp("c");
@@ -116,6 +114,29 @@ public class Main {
         test.printTransitions();
     }
 
+    public static void Practicum4() {
+        Character [] characters = {'a', 'b'};
+        NDFA<String> myAutomata = new NDFA<String>(characters);
+
+        myAutomata.addTransition(new Transition<String>("0", 'a', "1"));
+        myAutomata.addTransition(new Transition<String>("0", 'a', "2"));
+        myAutomata.addTransition(new Transition<String>("1", 'a', "1"));
+        myAutomata.addTransition(new Transition<String>("1", 'a', "2"));
+        myAutomata.addTransition(new Transition<String>("2", 'b', "1"));
+        myAutomata.addTransition(new Transition<String>("2", 'b', "3"));
+        myAutomata.addTransition(new Transition<String>("3", 'a', "2"));
+        myAutomata.addTransition(new Transition<String>("3", 'a', "1"));
+
+        myAutomata.defineAsStartState("0");
+        myAutomata.defineAsEndState("1");
+        System.out.println("De NDFA is ");
+        myAutomata.printTransitions();
+
+        System.out.println("DFA is dan ");
+        myAutomata.toDFA().printTransitions();
+
+    }
+
     public static void main(String[] args) {
 //        System.out.println("Here my code be");
 //        com.imegumii.codevandocent.Automata<String> t1 = TestAutomata.getExampleSlide8Lesson2();
@@ -131,6 +152,6 @@ public class Main {
 
 //        Practicum2();
 
-        Thompson();
+        Practicum4();
     }
 }
diff --git a/src/com/imegumii/NDFA.java b/src/com/imegumii/NDFA.java
index d86d410..600fb7c 100644
--- a/src/com/imegumii/NDFA.java
+++ b/src/com/imegumii/NDFA.java
@@ -1,6 +1,6 @@
 package com.imegumii;
 
-import java.util.SortedSet;
+import java.util.*;
 
 /**
  * Created by imegumii on 01/05/2017.
@@ -13,4 +13,68 @@ public class NDFA<T extends Comparable> extends Automata<T> {
     public NDFA(SortedSet<Character> symbols) {
         super(symbols);
     }
+
+    public SortedSet<T> statesBereikbaarVanaf(T vanaf, char s) {
+        SortedSet<T> bereikbaar = new TreeSet<T>();
+        Iterator<Transition<T>> it = this.transistions.iterator();
+
+        while(it.hasNext()) {
+            Transition<T> t = it.next();
+
+            boolean isGelijk = false;
+            isGelijk = s == t.symbol;
+
+            if (isGelijk && !bereikbaar.contains(t.naarState)) {
+                bereikbaar.add(t.naarState);
+                bereikbaar.addAll(statesBereikbaarVanaf(t.naarState, Transition.EPSILON));
+            }
+        }
+
+        return bereikbaar;
+    }
+
+    public SortedSet<T> statesBereikbaarVanafSymbool(char s) {
+        SortedSet<T> bereikbareStates = new TreeSet<T>();
+        Iterator<T> it = this.states.iterator();
+        while (it.hasNext()) {
+            T state = it.next();
+            bereikbareStates.addAll(statesBereikbaarVanaf(state, s));
+        }
+
+        return bereikbareStates;
+    }
+
+    public SortedSet<T> transitie (char c) {
+        SortedSet<T> bereikbareStates = statesBereikbaarVanafSymbool(c);
+        if (bereikbareStates.equals(this.states)) {
+            return this.states;
+        } else {
+            return bereikbareStates;
+        }
+    }
+
+    public DFA<T> toDFA () {
+        DFA<T> eindDFA = new DFA<T>(this.symbols);
+
+        SortedSet<T> startSet = new TreeSet<T>();
+        T firstState = this.beginStates.first();
+        startSet.add(firstState);
+        startSet.addAll(statesBereikbaarVanaf(firstState, Transition.EPSILON));
+        System.out.println("Begin states zijn: ");
+        startSet.forEach(System.out::println);
+
+        for (T t : startSet) {
+            eindDFA.defineAsStartState(t);
+        }
+
+        Queue<SortedSet<T>> kue = new LinkedList<>();
+        kue.offer(startSet);
+
+        while (!kue.isEmpty()) {
+            SortedSet<T> set = kue.poll();
+
+        }
+
+        return eindDFA;
+    }
 }
diff --git a/src/com/imegumii/Transition.java b/src/com/imegumii/Transition.java
index 0c457f3..f28636c 100644
--- a/src/com/imegumii/Transition.java
+++ b/src/com/imegumii/Transition.java
@@ -5,6 +5,7 @@ package com.imegumii;
  */
 public class Transition <T extends Comparable> implements Comparable<Transition<T>> {
     public static final char ENDCHAR = '$';
+
     public static final char EPSILON = 'ε';
 
     public T vanState;