diff --git a/src/main/java/org/sadtech/bot/core/domain/BoxAnswer.java b/src/main/java/org/sadtech/bot/core/domain/BoxAnswer.java
index d0e037c..968965a 100644
--- a/src/main/java/org/sadtech/bot/core/domain/BoxAnswer.java
+++ b/src/main/java/org/sadtech/bot/core/domain/BoxAnswer.java
@@ -10,6 +10,21 @@ public class BoxAnswer {
     private Float aLong;
     private Integer stickerId;
 
+    public BoxAnswer() {
+
+    }
+
+    public BoxAnswer(BoxAnswer target) {
+        if (target != null) {
+            this.message = target.getMessage();
+            this.keyboard = target.getKeyboard();
+            this.lat = target.getLat();
+            this.aLong = target.getaLong();
+            this.stickerId = target.getStickerId();
+        }
+    }
+
+
     public String getMessage() {
         return message;
     }
@@ -50,6 +65,10 @@ public class BoxAnswer {
         this.stickerId = stickerId;
     }
 
+    public BoxAnswer clone() {
+        return new BoxAnswer(this);
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;
@@ -66,4 +85,6 @@ public class BoxAnswer {
     public int hashCode() {
         return Objects.hash(message, keyboard, lat, aLong, stickerId);
     }
+
+
 }
diff --git a/src/main/java/org/sadtech/bot/core/domain/Comment.java b/src/main/java/org/sadtech/bot/core/domain/Comment.java
index d69cd77..40cc584 100644
--- a/src/main/java/org/sadtech/bot/core/domain/Comment.java
+++ b/src/main/java/org/sadtech/bot/core/domain/Comment.java
@@ -1,10 +1,9 @@
 package org.sadtech.bot.core.domain;
 
 //@TODO: Дописать класс
-public class Comment {
+public class Comment extends Content {
 
     private Integer postId;
-    private Person person;
     private String text;
     private Integer data;
 
@@ -12,11 +11,4 @@ public class Comment {
 
     }
 
-    public Person getPerson() {
-        return person;
-    }
-
-    public void setPerson(Person person) {
-        this.person = person;
-    }
 }
diff --git a/src/main/java/org/sadtech/bot/core/domain/Content.java b/src/main/java/org/sadtech/bot/core/domain/Content.java
new file mode 100644
index 0000000..96ae304
--- /dev/null
+++ b/src/main/java/org/sadtech/bot/core/domain/Content.java
@@ -0,0 +1,37 @@
+package org.sadtech.bot.core.domain;
+
+import java.util.Objects;
+
+public abstract class Content {
+
+    private Integer personId;
+
+    public Content() {
+
+    }
+
+    public Content(Content source) {
+        this.personId = source.getPersonId();
+    }
+
+    public Integer getPersonId() {
+        return personId;
+    }
+
+    public void setPersonId(Integer personId) {
+        this.personId = personId;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof Content)) return false;
+        Content content = (Content) o;
+        return Objects.equals(personId, content.personId);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(personId);
+    }
+}
diff --git a/src/main/java/org/sadtech/bot/core/domain/Mail.java b/src/main/java/org/sadtech/bot/core/domain/Mail.java
index 1952d8e..2e06d0b 100644
--- a/src/main/java/org/sadtech/bot/core/domain/Mail.java
+++ b/src/main/java/org/sadtech/bot/core/domain/Mail.java
@@ -2,17 +2,23 @@ package org.sadtech.bot.core.domain;
 
 import java.util.Objects;
 
-public class Mail {
+public class Mail extends Content {
 
     private Integer id;
     private Integer date;
-    private Integer peerId;
-    private String body;
+    private String message;
 
     public Mail() {
 
     }
 
+    public Mail(Mail source) {
+        super(source);
+        this.id = source.getId();
+        this.date = source.getDate();
+        this.message = source.getMessage();
+    }
+
     public Integer getId() {
         return id;
     }
@@ -30,44 +36,31 @@ public class Mail {
     }
 
 
-    public String getBody() {
-        return body;
+    public String getMessage() {
+        return message;
     }
 
-    public void setBody(String body) {
-        this.body = body;
+    public void setMessage(String message) {
+        this.message = message;
     }
 
-    public Integer getPeerId() {
-        return peerId;
-    }
-
-    public void setPeerId(Integer peerId) {
-        this.peerId = peerId;
+    public Mail clone() {
+        return new Mail(this);
     }
 
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;
-        if (o == null || getClass() != o.getClass()) return false;
+        if (!(o instanceof Mail)) return false;
+        if (!super.equals(o)) return false;
         Mail mail = (Mail) o;
         return Objects.equals(id, mail.id) &&
                 Objects.equals(date, mail.date) &&
-                Objects.equals(body, mail.body);
+                Objects.equals(message, mail.message);
     }
 
     @Override
     public int hashCode() {
-        return Objects.hash(id, date, body);
-    }
-
-    @Override
-    public String toString() {
-        return "Mail{" +
-                "id=" + id +
-                ", date=" + date +
-                ", peerId=" + peerId +
-                ", body='" + body + '\'' +
-                '}';
+        return Objects.hash(super.hashCode(), id, date, message);
     }
 }
diff --git a/src/main/java/org/sadtech/bot/core/insert/InsertWords.java b/src/main/java/org/sadtech/bot/core/insert/InsertWords.java
index 6f0ca70..687d9a7 100644
--- a/src/main/java/org/sadtech/bot/core/insert/InsertWords.java
+++ b/src/main/java/org/sadtech/bot/core/insert/InsertWords.java
@@ -6,12 +6,13 @@ import java.util.regex.Pattern;
 
 public class InsertWords {
 
-    private String inText;
-    private String outText;
+    private InsertWords() {
+        throw new IllegalStateException();
+    }
 
-    public void insert(List<String> words) {
+    public static String insert(String text, List<String> words) {
         Pattern pattern = Pattern.compile("\\{(\\d+)}");
-        Matcher m = pattern.matcher(inText);
+        Matcher m = pattern.matcher(text);
         StringBuffer result = new StringBuffer();
         while (m.find()) {
             if (Integer.parseInt(m.group(1)) < words.size()) {
@@ -21,15 +22,7 @@ public class InsertWords {
             }
         }
         m.appendTail(result);
-        outText = result.toString();
-    }
-
-    public void setInText(String inText) {
-        this.inText = inText;
-    }
-
-    public String getOutText() {
-        return outText;
+        return result.toString();
     }
 }