import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String str = scanner.next();
String str1 = encode(str);
System.out.println(str1);
}
public static String encode(String text) {
String result;
char[] chars = text.toCharArray();
char[] chRes = new char[chars.length];
for (int i = 0; i < chars.length; i++) {
if ((chars[i] >= 'A' && chars[i] < 'Z') || (chars[i] >= 'a' && chars[i] < 'z')) {
chRes[i] = (char) (chars[i] + 1);
} else if (chars[i] == 'z') {
chRes[i] = 'a';
} else if (chars[i] == 'Z') {
chRes[i] = 'A';
} else {
chRes[i] = chars[i];
}
}
result = String.valueOf(chRes);
return result;
}
}