/*
    No.18 うーさー暗号
    https://yukicoder.me/problems/no/18
    A, Z = 65, 90
*/
#include <bits/stdc++.h>
using namespace std;

void Usa_cryption(string s) {
    int rot = 1;
    for (auto ch : s) {
        // char temp = ch;
        // cout << (char)ch << ", " << (int)ch << "," << rot++ << endl;
        if (ch - rot < 65)
            cout << (char)(ch - rot + 26);
        else
            cout << (char)(ch - rot);
        if (rot == 26)
            rot = 0;
        rot++;
    }
    cout << endl;
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);

    string s;
    cin >> s;
    Usa_cryption(s);
}