#include <bits/stdc++.h>

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')) {
            cout << char(s[i] + 1);
        } else if (s[i] == 'z' || s[i] == 'Z') {
            cout << 'a';
        } else cout << s[i];
    }
    return 0;
}