diff --git a/.idea/misc.xml b/.idea/misc.xml
index a165cb3..cbb200f 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" default="false" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" default="false" project-jdk-name="11" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/src/crypto/Crypto.java b/src/crypto/Crypto.java
index 51d57b7..1a5cf53 100644
--- a/src/crypto/Crypto.java
+++ b/src/crypto/Crypto.java
@@ -5,6 +5,51 @@
 public class Crypto {
     public static void main(String[] args) {
         Scanner scanner = new Scanner(System.in);
-	// write your code here
+
+        String target;
+        if(args.length > 1 && args[0].equals("-mode")){
+            target = args[1];
+        } else{
+            target = "enc";
+        }
+
+        String message;
+        int offset;
+        if(args.length == 6 && args[4].equals("-data")){
+            message = args[5];
+            offset= Integer.parseInt(args[3]);
+        } else{
+            message = scanner.nextLine();
+            offset = scanner.nextInt();
+        }
+
+        if(target.equals("enc")){
+            System.out.println(enc(message, offset));
+        } else if(target.equals("dec")){
+            System.out.println(dec(message, offset));
+        }
+
+    }
+    public static String enc(String originalStr, int offset){
+        return offsetAll(originalStr, offset);
+    }
+
+    public static String dec(String originalStr, int offset){
+        return offsetAll(originalStr, -offset);
+    }
+    public static String offsetAll(String originalStr, int offset){
+        final int lettersStar = 97;
+        final int lettersAmount = 26;
+
+        StringBuilder out = new StringBuilder();
+        char[] letters = new char[originalStr.length()];
+        originalStr.getChars(0, originalStr.length(), letters, 0  );
+
+        for (int letter : letters){
+            letter = (letter + offset);
+            out.append((char)letter);
+        }
+
+        return out.toString();
     }
 }