#include <iostream>
#include <string>
using namespace std;
 
int main() {
    string mode;
    string text;
    int k;
 
    cin >> mode;
    cin >> k;
    cin.ignore();
    getline(cin, text);
 
    for (int i = 0; i < text.size(); i++) {
        char c = text[i];
 
        if (c >= 'A' && c <= 'Z') {
            if (mode == "szyfruj")
                text[i] = 'A' + (c - 'A' + k) % 26;
            else
                text[i] = 'A' + (c - 'A' - k) % 26;
        }
        else if (c >= 'a' && c <= 'z') {
            if (mode == "szyfruj")
                text[i] = 'a' + (c - 'a' + k) % 26;
            else
                text[i] = 'a' + (c - 'a' - k + 26) % 26;
        }
 
    }
 
    cout << text << endl;
 
    return 0;
}