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

int main() {
    string s;
    getline(cin, s);  

    for (int i = 0; i < s.length(); i++) {
        if ((s[i] >= 'a' && s[i] <= 'y') || (s[i] >= 'A' && s[i] <= 'Y')) {
            s[i] = s[i] + 1; 
        } else if (s[i] == 'z') {
            s[i] = 'a';  
        } else if (s[i] == 'Z') {
            s[i] = 'A';  
        }
    }
    cout << s << endl;
    return 0;
}