#include <bits/stdc++.h>
using namespace std;

const int N = 90;
char encrypted[N];
int main() {
    string input;
    getline(cin, input);

    int n = input.length();


    for (int i = 0; i < n; ++i) {
        char c = input[i];
        if (c >= 'a' && c <= 'y') {
            encrypted[i] = c + 1;
        } else if (c == 'z') {
            encrypted[i] = 'a';
        } else if (c >= 'A' && c <= 'Y') {
            encrypted[i] = c + 1;
        } else if (c == 'Z') {
            encrypted[i] = 'A';
        } else {
            encrypted[i] = c;
        }
    }
    for (int i = 0; i < n; ++i) {
        cout << encrypted[i];
    }
    cout << endl;

    return 0;
}