diff --git a/src/main/java/cipher_analytical_machine/analyzers/caesar/FrequencyAnalyzer.java b/src/main/java/cipher_analytical_machine/analyzers/caesar/FrequencyAnalyzer.java
index 31a68d8..c499de3 100644
--- a/src/main/java/cipher_analytical_machine/analyzers/caesar/FrequencyAnalyzer.java
+++ b/src/main/java/cipher_analytical_machine/analyzers/caesar/FrequencyAnalyzer.java
@@ -1,25 +1,50 @@
 package cipher_analytical_machine.analyzers.caesar;
 
 import cipher_analytical_machine.ciphers.caesar.Decrypted;
+
+import java.util.HashMap;
 import java.util.Map;
+import java.util.Map.Entry;
 
 public class FrequencyAnalyzer {
     private String ciphertext;
-    private int key;
     private String symbols;
     private String symbol_frequences;
     private Decrypted decryptor;
 
     public FrequencyAnalyzer(String ciphertext, String symbols, String symbol_frequences, Decrypted decryptor) {
-	this.ciphertext = ciphertext;
-	this.key = 1;
-	this.symbols = symbols;
-	this.symbol_frequences = symbol_frequences;
-	this.decryptor = decryptor;
+	    this.ciphertext = ciphertext;
+        this.symbol_frequences = symbol_frequences;
+        this.symbols = symbols;
+	    this.decryptor = decryptor;
     }
 
     public String crack() {
-	return decryptor.decrypt(ciphertext, key, symbols);
+        // Знаходимо кількість літер
+        Map<Character, Integer> encryptedLetterCounts = new HashMap<>();
+
+        for (char c : ciphertext.toLowerCase().toCharArray()) {
+            encryptedLetterCounts.put(c, encryptedLetterCounts.getOrDefault(c, 0) + 1);
+        }
+
+        // Знаходимо букву, яка зустрічається найчастіше
+        char mostFrequentEncryptedLetter = ' ';
+        int mostFrequentEncryptedLetterCount = 0;
+
+        for (Entry<Character, Integer> entry : encryptedLetterCounts.entrySet()) {
+            if (entry.getValue() > mostFrequentEncryptedLetterCount) {
+                mostFrequentEncryptedLetter = entry.getKey();
+                mostFrequentEncryptedLetterCount = entry.getValue();
+            }
+        }
+
+        // Обчислимо зміщення
+        int size = symbols.length();
+        int indexOfMostFrequentEncryptedLetter = symbols.indexOf(mostFrequentEncryptedLetter);
+        int indexOfMostFrequentLetter = symbols.indexOf(symbol_frequences.charAt(0));
+        int shift = (indexOfMostFrequentEncryptedLetter - indexOfMostFrequentLetter) % size;
+
+        return decryptor.decrypt(ciphertext, shift, symbols);
     }
 }