#include<iostream>
#include<string>

using namespace std;

int main(){

    string s;
    getline(cin,s);

    for(int i=0;i<s.size();i++){
        if(s[i]>='a' && s[i]<='z'){
            s[i] = (s[i]-'a'+1)%26+'a';
        }else if(s[i]>='A' && s[i]<='Z'){
            s[i] = (s[i]-'A'+1)%26+'A';
        }
    }

    cout << s << endl;
    return 0;
}