import java.io.*;


public class rot13 {

public static void main(String[] args) throws IOException {
    BufferedReader myInput = new BufferedReader(new InputStreamReader(System.in));
    System.out.println("Enter a word: ");
    String input = myInput.readLine();

    for (char c : input.toCharArray()) {
        if (Character.isAlphabetic(c)) {
            char lowerChar = (char) (Character.toLowerCase(c) - 97);
            lowerChar += 13;
            lowerChar %= 26;
            lowerChar += 97;
            System.out.print(Character.isUpperCase(c) ? Character.toUpperCase(lowerChar) : lowerChar);
        } else {
            System.out.print(c);
        }
    }

    myInput.close();
}
}