#include <bits/stdc++.h>
using namespace std;
int main()
{
    string s;
    int k,i,n,x;
    char c;
    while(getline(cin,s)){
        n=s.length();
        for(i=0;i<n;i++){
            if(islower(s[i])){
                k=s[i]-'a';
                k=k-4;
                if(k<0) k=k+26;
                c='a'+k;
                cout<<c;
            }
            else cout<<s[i];
        }
        cout<<endl;
    }
}

