#include <stdio.h>

#include <stdlib.h>

#include <string>

#include <algorithm>

#include <iostream>

using namespace std;

int main(){

    string s1, s2;

    getline(cin, s1);

    s2 = s1.substr(s1.find(" ") + , s1.length() - s1.find(" "));

    s1.erase(s1.find(" "), s1.length() - s1.find(" "));

    while (s2.length() < s1.length()){

        s2.insert(, "");

    }

    //cin >> s1 >> s2;

    reverse(s1.begin(), s1.end());

    reverse(s2.begin(), s2.end());

    int res;

    for (int i = ; i < s2.length() && i < s1.length(); i++){

        if (i %  == ){

            res = (s1[i] - '' + s2[i] - '')%;

            if (res < )s2[i] = '' + res;

            else if (res == )s2[i] = 'J';

            else if (res == )s2[i] = 'Q';

            else if (res == )s2[i] = 'K';

        }

        else{

            res = s2[i] - '' - s1[i] + '';

            if (res < )res += ;

            s2[i] = '' + res;

        }

        //cout << s2[i] << endl;

    }

    reverse(s2.begin(),s2.end());

    cout << s2;

    system("pause");

}