#include <iostream>
using namespace std;

int main() {
    string str;
    getline(cin, str);
    for (int i = 0; i < str.size(); ++i) {
        if (str[i] >= 'a' && str[i] <= 'z') {
            str[i] = (str[i] - 'a' + 1) % 26 + 'a';
        }
        if(str[i] >= 'A' && str[i] <= 'Z'){
            str[i] = (str[i] - 'A' + 1) % 26 + 'A';
        }
    }
    std::cout << str << std::endl;
}