import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class No18{ public static void main(String args[]) throws IOException{ String str = new BufferedReader(new InputStreamReader(System.in)).readLine(); byte[] inputToNum = str.getBytes(); for(int i=0; i<str.length(); i++){ inputToNum[i] -= (i+1) % 26; if(inputToNum[i] < 65){ inputToNum[i] += 26; } } System.out.println(new String(inputToNum)); } }