diff --git a/book/src/main/java/ru/molokoin/Book.java b/book/src/main/java/ru/molokoin/Book.java
index 937d17b..f8b2fab 100644
--- a/book/src/main/java/ru/molokoin/Book.java
+++ b/book/src/main/java/ru/molokoin/Book.java
@@ -98,7 +98,7 @@ public class Book {
                 throw new NullPointerException("в случае, если массив authors еще не создан и писать нового автора некуда, создаем пустой массив, пишем в него данные нового автора ...");
             } catch (NullPointerException e) {
                 //e.printStackTrace();
-                System.out.println(e);
+                System.out.println(e.getMessage());
                 result = new String[1];
                 result[0] = author;
                 setAuthors(result);
diff --git a/book/target/classes/ru/molokoin/Book.class b/book/target/classes/ru/molokoin/Book.class
index 42f9f1a..eeaaba2 100644
Binary files a/book/target/classes/ru/molokoin/Book.class and b/book/target/classes/ru/molokoin/Book.class differ
diff --git a/practice/src/main/java/ru/molokoin/App.java b/practice/src/main/java/ru/molokoin/App.java
index a0cf042..e98cee2 100644
--- a/practice/src/main/java/ru/molokoin/App.java
+++ b/practice/src/main/java/ru/molokoin/App.java
@@ -1,6 +1,11 @@
 package ru.molokoin;
+
 public class App {
     public static void main(String[] args) {
-        System.out.println("qq");
+        //int[] array = {10, 2, 120,324,8,0};
+        Person[] array = new Person[2];
+        array[0] = new Person("Ivan", "Ivanov");
+        array[1] = new Soldier("Aleksey", "Alekseev", MilitarySpeciality.GUNLAYER);
+        array[1].toString();
     }
 }
diff --git a/practice/src/main/java/ru/molokoin/Employe.java b/practice/src/main/java/ru/molokoin/Employe.java
new file mode 100644
index 0000000..0f32a92
--- /dev/null
+++ b/practice/src/main/java/ru/molokoin/Employe.java
@@ -0,0 +1,5 @@
+package ru.molokoin;
+
+public class Employe {
+    
+}
diff --git a/practice/src/main/java/ru/molokoin/MilitarySpeciality.java b/practice/src/main/java/ru/molokoin/MilitarySpeciality.java
new file mode 100644
index 0000000..f9c4724
--- /dev/null
+++ b/practice/src/main/java/ru/molokoin/MilitarySpeciality.java
@@ -0,0 +1,9 @@
+package ru.molokoin;
+
+public enum MilitarySpeciality {
+    RADIOOPERATOR,
+    TANKMAN,
+    GUNLAYER,
+    DRIVER;
+
+}
diff --git a/practice/src/main/java/ru/molokoin/Person.java b/practice/src/main/java/ru/molokoin/Person.java
new file mode 100644
index 0000000..c20b801
--- /dev/null
+++ b/practice/src/main/java/ru/molokoin/Person.java
@@ -0,0 +1,27 @@
+package ru.molokoin;
+
+public class Person {
+    private String firstname;
+    private String lastname;
+    public Person(String firstname, String lastname){
+        setFirstname(firstname);
+        setLastname(lastname);
+    }
+
+    public String getFirstname() {
+        return firstname;
+    }
+    public void setFirstname(String firstname) {
+        this.firstname = firstname;
+    }
+    public String getLastname() {
+        return lastname;
+    }
+    public void setLastname(String lastname) {
+        this.lastname = lastname;
+    }
+    @Override
+    public String toString(){
+        return "firstname: " + getFirstname() + " : " + "Lastname: " + getLastname();
+    }
+}
diff --git a/practice/src/main/java/ru/molokoin/Soldier.java b/practice/src/main/java/ru/molokoin/Soldier.java
new file mode 100644
index 0000000..58df2ce
--- /dev/null
+++ b/practice/src/main/java/ru/molokoin/Soldier.java
@@ -0,0 +1,16 @@
+package ru.molokoin;
+
+public class Soldier extends Person{
+    private MilitarySpeciality militarySpeciality;
+    public Soldier(String firstname, String lastname,  MilitarySpeciality militarySpeciality){
+        super(firstname, lastname);
+        setMilitarySpeciality(militarySpeciality);
+        
+    }
+    public MilitarySpeciality getMilitarySpeciality() {
+        return militarySpeciality;
+    }
+    public void setMilitarySpeciality(MilitarySpeciality militarySpeciality) {
+        this.militarySpeciality = militarySpeciality;
+    }
+}
diff --git a/practice/target/classes/ru/molokoin/App.class b/practice/target/classes/ru/molokoin/App.class
index fb4e1e4..3e11983 100644
Binary files a/practice/target/classes/ru/molokoin/App.class and b/practice/target/classes/ru/molokoin/App.class differ
diff --git a/practice/target/classes/ru/molokoin/Employe.class b/practice/target/classes/ru/molokoin/Employe.class
new file mode 100644
index 0000000..5345f99
Binary files /dev/null and b/practice/target/classes/ru/molokoin/Employe.class differ
diff --git a/practice/target/classes/ru/molokoin/MilitarySpeciality.class b/practice/target/classes/ru/molokoin/MilitarySpeciality.class
new file mode 100644
index 0000000..fdc792a
Binary files /dev/null and b/practice/target/classes/ru/molokoin/MilitarySpeciality.class differ
diff --git a/practice/target/classes/ru/molokoin/Person.class b/practice/target/classes/ru/molokoin/Person.class
new file mode 100644
index 0000000..5d91567
Binary files /dev/null and b/practice/target/classes/ru/molokoin/Person.class differ
diff --git a/practice/target/classes/ru/molokoin/Soldier.class b/practice/target/classes/ru/molokoin/Soldier.class
new file mode 100644
index 0000000..7e2b76d
Binary files /dev/null and b/practice/target/classes/ru/molokoin/Soldier.class differ