diff --git a/src/praktikum04/SorterClient.java b/src/praktikum04/SorterClient.java
new file mode 100644
index 0000000..086d6e6
--- /dev/null
+++ b/src/praktikum04/SorterClient.java
@@ -0,0 +1,54 @@
+package praktikum04;
+
+
+import javax.sound.sampled.Port;
+import java.io.*;
+import java.net.*;
+import java.util.Scanner;
+
+public class SorterClient {
+
+    public static void main(String[] args) {
+        SorterClient client = new SorterClient();
+        client.run();
+    }
+
+    private void run() {
+        Scanner scanner = new Scanner(System.in);
+        while (scanner.hasNextLine()) {
+            String line = scanner.nextLine();
+            if (line.isEmpty())
+                break;
+            line = sort(line);
+            System.out.println(line);
+        }
+        scanner.close();
+    }
+
+    private String sort(String line) {
+        InetSocketAddress address =
+                new InetSocketAddress("localhost", 12345);
+        try (Socket socket = new Socket()) {
+            socket.connect(address);
+            sendLine(socket, line);
+            String answer = receiveLine(socket);
+            return answer;
+        } catch (Exception e) {
+            System.err.println("Error: " + e.getMessage());
+        }
+        return "*";
+    }
+
+    public static void sendLine(Socket socket, String line) throws IOException {
+        OutputStream out = socket.getOutputStream();
+        PrintWriter writer = new PrintWriter(out);
+        writer.println(line);
+        writer.flush();
+    }
+
+    public static String receiveLine(Socket socket) throws IOException {
+        InputStream in = socket.getInputStream();
+        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
+        return reader.readLine();
+    }
+}
diff --git a/src/praktikum04/SorterServer.java b/src/praktikum04/SorterServer.java
new file mode 100644
index 0000000..fd3823b
--- /dev/null
+++ b/src/praktikum04/SorterServer.java
@@ -0,0 +1,60 @@
+package praktikum04;
+
+import java.io.*;
+import java.net.*;
+import java.util.Arrays;
+
+public class SorterServer implements Runnable {
+    public static void main(String[] args) {
+
+        final int port = 12345;
+        try (ServerSocket socket = new ServerSocket(port)) {
+            while (true) {
+                Socket client = socket.accept();
+                Thread thread = new Thread(new SorterServer(client));
+                thread.start();
+            }
+        }
+        catch (Exception e) {
+            System.err.println("Error: " + e.getMessage());
+        }
+    }
+
+    Socket client;
+
+    private SorterServer(Socket client) {
+        this.client = client;
+    }
+
+    public void run() {
+        try {
+            String line = receiveLine(client);
+            char[] chars = line.toCharArray();
+            Arrays.sort(chars);
+            String answer = new String(chars);
+            sendLine(client, answer);
+            System.out.println(line + " -> " + answer);
+        }
+        catch (Exception e) {
+            System.err.println("Error: " + e.getMessage());
+        }
+        finally {
+            try { client.close(); } catch (Exception e) {}
+        }
+    }
+
+    public static void sendLine(Socket socket, String line) throws IOException {
+        OutputStream out = socket.getOutputStream();
+        PrintWriter writer = new PrintWriter(out);
+        writer.println(line);
+        writer.flush();
+    }
+
+    public static String receiveLine(Socket socket) throws IOException {
+        InputStream in = socket.getInputStream();
+        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
+        return reader.readLine();
+    }
+
+
+}