#include <iostream>
#include <fstream>
#include <cstdlib>
#include <string.h>


using namespace std;

int main()
{
    ifstream myfile("dane_6_3.txt");
    if( !myfile.good() || !myfile.is_open() ){
        cout << "Error!";    exit(0);
    }

    string norm, encr, sub = 0;
    ofstream yourfile("wyniki_6_3.txt");

    while (myfile >> norm && myfile >> encr){
        for(int i=0; i < norm.length(); i++){
            if((int)norm[i] > (int)encr[i]){
                if(i==0)    sub = (encr[i] - 65) + (90 - norm[i]);
                if(i>0 && ((encr[i] - 65) + (90 - norm[i]) != sub))

            }
            else if ((int)norm[i] < (int)encr[i]){
                if(i==0)    sub = (encr[i] - norm[i]);
                if(i>0 && (encr[i] - norm[i]) != sub)
                    {yourfile << norm << endl; break;}
            }
        }
    }

    myfile.close();
    yourfile.close();
    return 0;
}