import java.io.IOException; import java.io.BufferedReader; import java.io.InputStreamReader; class Main { public static void main(String[] args) throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); char[] line = br.readLine().toCharArray(); StringBuilder sb = new StringBuilder(); for (int i = 0; i < line.length; i++) { int diff = (int) (line[i] - (i + 1) % 26); if (diff < 0) diff += 26; sb.append((char) (diff)); } System.out.println(sb.toString()); } }