jt

#include <iostream>
#include <cstdio>
#include <string>
using namespace std;

char c[110000];
string str;

void f(char c[], string &str) {
fgets(c, 110000, stdin);
int len = 0;

while (c[len] != '\0' && c[len] != '\n') {  
    len++;  
}  
if (c[len] == '\n') {  
    c[len] = '\0'; 
}  


for (int i = 0; i < len; i++) {  
    if (c[i] >= 'a' && c[i] <= 'y') {  
        c[i] = c[i] + 1;  
    } else if (c[i] == 'z') {  
        c[i] = 'a';  
    }  
    
}  


str = string(c);  
cout << str << endl;  

}

int main() {
f(c, str);
return 0;
}