import java.util.Scanner;
public class Main{
    public static void main(String[] args)
    {
        Scanner sc=new Scanner(System.in);
        String str=sc.nextLine();
        for(char c:str.toCharArray()){
            if(c>='a'&&c<='z')
            c=(char)((c-'a'+1)%26+'a');
            else if(c>='A'&&c<='Z')
            c=(char)((c-'A'+1)%26+'A');
            System.out.print(c);
        }
        //System.out.printf("%d",(int)'a');
        //System.out.printf("%d",(int)'A');
    }
}