#include <fstream>
#include <string>

using namespace std;

ifstream cin("polybius.in");
ofstream cout("polybius.out");

char lipsa;

int frec[105];

void rez1()
{
    string s;
    cin >> s;
    for(int i = 0 ; i < s.length() ; i++)
        cout << frec[(int)s[i]];
}

void rez2()
{
    string s;
    cin >> s;

    for(int i = 0 ; i < s.length() ; i = i + 2)
            cout << (char)frec[ ( s[i] - '0' ) * 10 + (s[i+1] - '0')];

}

int main()
{
    int p;
    cin >> p;

    string s;
    cin >> s;

    //cout << s << '\n';
    int ant;

    ant = (int)s[0];

    if(ant == 66)
        lipsa = (char) 66;
    else
    {
        for(int i = 1 ; i < s.length() ; i++)
            if((int)s[i] == (int) ant + 1)
                ant = s[i];
            else
            {
                lipsa = (char) ant + 1;
                break ;
            }
    }



    int nr = 1;

    for(int k = 0 ; s[k] ; k++)
    {
        int lin = nr / 5;
        int col = nr % 5;
        if(!col)
            col = 5;
        else
            lin++;


        frec[(int)s[k]] = lin * 10 + col;

        frec[lin * 10 + col] = (int) s[k];

        //cout << (int) s[k] << ' ' << lin * 10 + col << ' ' <<
        //frec[(int)s[k]]  << ' ' <<  frec[lin * 10 + col] << '\n';


        nr++;
    }


    /*cout << lipsa << '\n';
    for(int i = 1 ; i <= 5 ; i++)
    {
        for(int j = 1 ; j <= 5 ; j++)
            cout << tabel[i][j] << ' ';
        cout << '\n';
    }*/


    (p == 1) ? rez1() : rez2() ;
    return 0;
}