import java.util.Scanner;

public class CaesarCipher {

    static String encode(String text, int key) {
        String result = "";

        for (char ch : text.toCharArray()) {
            if (ch >= 'A' && ch <= 'Z') {
                ch = (char) ((ch - 'A' + key) % 26 + 'A');
            } else if (ch >= 'a' && ch <= 'z') {
                ch = (char) ((ch - 'a' + key) % 26 + 'a');
            }

            result += ch;
        }

        return result;
    }

    static String decode(String text, int key) {
        String result = "";

        for (char ch : text.toCharArray()) {
            if (ch >= 'A' && ch <= 'Z') {
                ch = (char) ((ch - 'A' - key + 26) % 26 + 'A');
            } else if (ch >= 'a' && ch <= 'z') {
                ch = (char) ((ch - 'a' - key + 26) % 26 + 'a');
            }

            result += ch;
        }

        return result;
    }

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter text: ");
        String text = sc.nextLine();

        System.out.print("Enter key: ");
        int key = sc.nextInt();

        key = key % 26;

        String encodedText = encode(text, key);
        String decodedText = decode(encodedText, key);

        System.out.println("\nOriginal Text : " + text);
        System.out.println("Encoded Text  : " + encodedText);
        System.out.println("Decoded Text  : " + decodedText);

        sc.close();
    }
}