#include <iostream>
#include <string>

using namespace std;

int main() {
    string input;
    const int alph_lim = 26;

    while (getline(cin, input, '\n')) {
        for (int i = 0; i < alph_lim; i++) {
            for (int j = 0; j < input.size(); j++){
                if(islower(input[j])) {
                    input[j]++;
                    if (input[j] > 'z') {
                        input[j] -= alph_lim;
                    }
                }
            }

            if (input.find("this") != string::npos
                || input.find("that") != string::npos
                || input.find("ths") != string::npos) {

                cout << input << endl;
                break;
            }
        }
    }
    return 0;
}