diff --git a/build.gradle b/build.gradle
index f8a6846..9192cf2 100644
--- a/build.gradle
+++ b/build.gradle
@@ -10,6 +10,12 @@ repositories {
 }
 
 dependencies {
+    implementation 'org.slf4j:slf4j-api:2.0.17'
+    implementation 'ch.qos.logback:logback-classic:1.5.25'
+
+    compileOnly 'org.projectlombok:lombok:1.18.42'
+    annotationProcessor 'org.projectlombok:lombok:1.18.42'
+
     testImplementation platform('org.junit:junit-bom:5.10.0')
     testImplementation 'org.junit.jupiter:junit-jupiter'
 }
diff --git a/src/main/java/ru/ilug/c1_word_counter/MainTest.java b/src/main/java/ru/ilug/c1_word_counter/MainTest.java
index efa134a..f24a012 100644
--- a/src/main/java/ru/ilug/c1_word_counter/MainTest.java
+++ b/src/main/java/ru/ilug/c1_word_counter/MainTest.java
@@ -1,16 +1,19 @@
 package ru.ilug.c1_word_counter;
 
+import lombok.extern.slf4j.Slf4j;
+
 import java.util.Map;
 
+@Slf4j
 public class MainTest {
 
     public static void main(String[] args) {
-        WordCounter wordCounter = null;
+        WordCounter wordCounter = new WordCounterImpl();
 
-        String text = "Внутри Map данные хранятся в формате “ключ”-”значение”, то есть по парам. И в качестве ключей, и в качестве значений могут выступать любые объекты — числа, строки или объекты других классов.";
+        String text = "Внутри Map данные хранятся в формате ключ значение, то есть по парам. И в качестве ключей, и в качестве значений могут выступать любые объекты числа, строки или объекты других классов.";
         Map<String, Integer> wordsCountMap = wordCounter.countWords(text);
 
-        System.out.println("Words count: " + wordsCountMap);
+        log.info("Words count: {}", wordsCountMap);
     }
 
 }
diff --git a/src/main/java/ru/ilug/c2_phone_book/MainTest.java b/src/main/java/ru/ilug/c2_phone_book/MainTest.java
index 88e745f..ec6941d 100644
--- a/src/main/java/ru/ilug/c2_phone_book/MainTest.java
+++ b/src/main/java/ru/ilug/c2_phone_book/MainTest.java
@@ -1,5 +1,8 @@
 package ru.ilug.c2_phone_book;
 
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
 public class MainTest {
 
     public static void main(String[] args) {
@@ -10,12 +13,12 @@ public class MainTest {
         phoneBook.addContact("Andrey", "+8 (910) 111 21 31");
         phoneBook.addContact("Maria", "+4 (234) 567 89 10");
 
-        System.out.println("Maria phone: " + phoneBook.findPhoneByName("Maria"));
-        System.out.println("Dima phone: " + phoneBook.findPhoneByName("Dima"));
+        log.info("Maria phone: {}", phoneBook.findPhoneByName("Maria"));
+        log.info("Dima phone: {}", phoneBook.findPhoneByName("Dima"));
 
         phoneBook.removeContactByName("Dima");
 
-        System.out.println("Dima phone: " + phoneBook.findPhoneByName("Dima"));
+        log.info("Dima phone: {}", phoneBook.findPhoneByName("Dima"));
     }
 
 }
diff --git a/src/main/java/ru/ilug/c3_simple_translator/MainTest.java b/src/main/java/ru/ilug/c3_simple_translator/MainTest.java
index 9453cf4..31e3e93 100644
--- a/src/main/java/ru/ilug/c3_simple_translator/MainTest.java
+++ b/src/main/java/ru/ilug/c3_simple_translator/MainTest.java
@@ -1,5 +1,8 @@
 package ru.ilug.c3_simple_translator;
 
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
 public class MainTest {
 
     public static void main(String[] args) {
@@ -16,8 +19,8 @@ public class MainTest {
         String text1 = "Подборка практических задач";
         String text2 = "Статистическая оценка линии производства";
 
-        System.out.println(text1 + " -> " + simpleTranslator.translate(text1));
-        System.out.println(text2 + " -> " + simpleTranslator.translate(text2));
+        log.info("{} -> {}", text1, simpleTranslator.translate(text1));
+        log.info("{} -> {}", text2, simpleTranslator.translate(text2));
     }
 
 }
diff --git a/src/main/java/ru/ilug/c4_school_journal/MainTest.java b/src/main/java/ru/ilug/c4_school_journal/MainTest.java
index d807c18..c07909c 100644
--- a/src/main/java/ru/ilug/c4_school_journal/MainTest.java
+++ b/src/main/java/ru/ilug/c4_school_journal/MainTest.java
@@ -1,8 +1,11 @@
 package ru.ilug.c4_school_journal;
 
+import lombok.extern.slf4j.Slf4j;
+
 import java.util.List;
 import java.util.Map;
 
+@Slf4j
 public class MainTest {
 
     public static void main(String[] args) {
@@ -15,13 +18,13 @@ public class MainTest {
         schoolJournal.addScore("Alexandr", 3);
 
         Map<String, Float> averagesScores = schoolJournal.getAverageScorePerStudent();
-        System.out.println("Average students scores: " + averagesScores);
+        log.info("Average students scores: {}", averagesScores);
 
         List<String> students1 = schoolJournal.studentsWithAverageScoreHighThen(4.5f);
-        System.out.println("Students with average score high then 4.5:" + students1);
+        log.info("Students with average score high then 4.5:{}", students1);
 
         List<String> students2 = schoolJournal.studentsWithAverageScoreHighThen(3);
-        System.out.println("Students with average score high then 3:" + students2);
+        log.info("Students with average score high then 3:{}", students2);
     }
 
 }
diff --git a/src/main/java/ru/ilug/c5_char_frequency/MainTest.java b/src/main/java/ru/ilug/c5_char_frequency/MainTest.java
index 2254558..a2257f4 100644
--- a/src/main/java/ru/ilug/c5_char_frequency/MainTest.java
+++ b/src/main/java/ru/ilug/c5_char_frequency/MainTest.java
@@ -1,5 +1,8 @@
 package ru.ilug.c5_char_frequency;
 
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
 public class MainTest {
 
     public static void main(String[] args) {
@@ -8,8 +11,8 @@ public class MainTest {
         String text1 = "Мама мыла Милку мылом";
         String text2 = "Карл у Клары украл рекламу, а Клара у Карла украла бюджет.";
 
-        System.out.println("First char frequency: " + charFrequency.getSortedCharFrequency(text1));
-        System.out.println("Second char frequency: " + charFrequency.getSortedCharFrequency(text2));
+        log.info("First char frequency: {}", charFrequency.getSortedCharFrequency(text1));
+        log.info("Second char frequency: {}", charFrequency.getSortedCharFrequency(text2));
     }
 
 }
diff --git a/src/main/java/ru/ilug/c6_word_group/MainTest.java b/src/main/java/ru/ilug/c6_word_group/MainTest.java
index 64e0640..58a5e26 100644
--- a/src/main/java/ru/ilug/c6_word_group/MainTest.java
+++ b/src/main/java/ru/ilug/c6_word_group/MainTest.java
@@ -1,5 +1,8 @@
 package ru.ilug.c6_word_group;
 
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
 public class MainTest {
 
     public static void main(String[] args) {
@@ -8,8 +11,8 @@ public class MainTest {
         String text1 = "Карл у Клары украл рекламу, а Клара у Карла украла бюджет.";
         String text2 = "Из кузова в кузов шла перегрузка арбузов. В грозу, в грязи от груза арбузов развалился кузов.";
 
-        System.out.println("First grouped words: " + wordGroup.groupWordsByLength(text1));
-        System.out.println("Second grouped words: " + wordGroup.groupWordsByLength(text2));
+        log.info("First grouped words: {}", wordGroup.groupWordsByLength(text1));
+        log.info("Second grouped words: {}", wordGroup.groupWordsByLength(text2));
     }
 
 }