diff --git a/src/main/java/org/sadtech/autoresponder/Autoresponder.java b/src/main/java/org/sadtech/autoresponder/Autoresponder.java
index 6c081cf..80b104f 100644
--- a/src/main/java/org/sadtech/autoresponder/Autoresponder.java
+++ b/src/main/java/org/sadtech/autoresponder/Autoresponder.java
@@ -40,9 +40,6 @@ public class Autoresponder {
         this.defaultUnit = defaultUnit;
     }
 
-    /*
-            Возвращает unit на основании сообщения пользователя
-         */
     public Unit answer(Integer personId, String message) {
         UnitPointer unitPointer = checkAndAddPerson(personId);
         Unit unit;
diff --git a/src/main/java/org/sadtech/autoresponder/entity/Unit.java b/src/main/java/org/sadtech/autoresponder/entity/Unit.java
index 4efc004..3880082 100644
--- a/src/main/java/org/sadtech/autoresponder/entity/Unit.java
+++ b/src/main/java/org/sadtech/autoresponder/entity/Unit.java
@@ -17,11 +17,11 @@ public abstract class Unit {
     private Integer priority = 10;
     private Set<Unit> nextUnits;
 
-    public void setKeyWord(String... keyWords) {
+    public void setKeyWord(String... keyWord) {
         if (this.keyWords == null) {
             this.keyWords = new HashSet<>();
         }
-        this.keyWords.addAll(Arrays.asList(keyWords));
+        this.keyWords.addAll(Arrays.asList(keyWord));
     }
 
     public void setKeyWords(Set<String> keyWords) {
@@ -35,11 +35,11 @@ public abstract class Unit {
         return keyWords;
     }
 
-    public void setNextUnit(Unit... units) {
+    public void setNextUnit(Unit... unit) {
         if (nextUnits == null) {
             nextUnits = new HashSet<>();
         }
-        nextUnits.addAll(Arrays.asList(units));
+        nextUnits.addAll(Arrays.asList(unit));
     }
 
     public void setNextUnits(Set<Unit> nextUnits) {
@@ -80,7 +80,7 @@ public abstract class Unit {
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;
-        if (o == null || getClass() != o.getClass()) return false;
+        if (!(o instanceof Unit)) return false;
         Unit unit = (Unit) o;
         return Objects.equals(keyWords, unit.keyWords) &&
                 Objects.equals(pattern, unit.pattern) &&
diff --git a/src/main/java/org/sadtech/autoresponder/entity/UnitPointer.java b/src/main/java/org/sadtech/autoresponder/entity/UnitPointer.java
index 84eb190..271c5c4 100644
--- a/src/main/java/org/sadtech/autoresponder/entity/UnitPointer.java
+++ b/src/main/java/org/sadtech/autoresponder/entity/UnitPointer.java
@@ -48,4 +48,12 @@ public class UnitPointer {
     public int hashCode() {
         return Objects.hash(entityId, unit);
     }
+
+    @Override
+    public String toString() {
+        return "UnitPointer{" +
+                "entityId=" + entityId +
+                ", unit=" + unit +
+                '}';
+    }
 }
diff --git a/src/main/java/org/sadtech/autoresponder/util/Parser.java b/src/main/java/org/sadtech/autoresponder/util/Parser.java
index 9fc5d54..4466194 100644
--- a/src/main/java/org/sadtech/autoresponder/util/Parser.java
+++ b/src/main/java/org/sadtech/autoresponder/util/Parser.java
@@ -4,12 +4,19 @@ import java.util.HashSet;
 import java.util.Set;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 /*
     Возвращает Set слов из текста
  */
 public class Parser {
 
+    private static final Set<String> pretexts = Stream
+            .of("в", "без", "до", "из", "к", "на", "по", "о", "от", "перед", "при", "с", "у", "за", "над", "об",
+                    "под", "про", "для")
+            .collect(Collectors.toSet());
+
     private Parser() {
         throw new IllegalStateException("Utility Class");
     }
@@ -21,6 +28,7 @@ public class Parser {
         while (m.find()) {
             words.add(m.group().toLowerCase());
         }
+        words.removeAll(pretexts);
         return words;
     }