#include <stdio.h>

int main()
{
    int n;
    int r,s;
    int a[26][26];
    int pocet[26];
    char chyba, navyse, jediny;
    int naspocet;

    int ctrl;

    while(1)
    {
        ctrl=scanf("%d\n", &n);
        if(ctrl==EOF) {break;}

        for(r=0; r<=26-1; r++) {pocet[r]=0;}
        //------------------------------nacitanie matice
        for(r=0; r<=n-1; r++)
        {
            for(s=0; s<=n-1; s++)
            {
                a[r][s]=getchar();
                pocet[a[r][s]-'A']++;
            }
            scanf("\n");  //reads newline
        }
        //-----------------------------koniec nacitania matice
        chyba=0;
        navyse=0;
        jediny=0;

        for(r=0; r<=26-1; r++)
        {
            if(pocet[r]==1) {jediny=r+'A'; break;}
            if(pocet[r]==n+1) {navyse=r+'A'; break;}
        }
        for(r=0; r<=26-1; r++)
        {
            if(pocet[r]==n-1) {chyba=r+'A'; break;}
        }
        //----------------------------------jediny !=0
        if(jediny!=0)
        {
            for(r=0; r<=n-1; r++)
            {
                for(s=0; s<=n-1; s++)
                {
                    if(a[r][s]==jediny)
                        {printf("%d %d %c\n", r+1, s+1, chyba);}
                }
            }
        }
        //-----------------------------------koniec jediny !=0
        //-----------------------------------navyse!=0
        if(navyse!=0)
        {
            for(r=0; r<=n-1; r++)
            {
                naspocet=0;
                for(s=0; s<=n-1; s++)
                {
                    if(a[r][s]==navyse) {naspocet++;}
                }
                if(naspocet==2) {printf("%d ", r+1); break;}
            }
        }
        if(navyse!=0)
        {
            for(s=0; s<=n-1; s++)
            {
                naspocet=0;
                for(r=0; r<=n-1; r++)
                {
                    if(a[r][s]==navyse) {naspocet++;}
                }
                if(naspocet==2) {printf("%d ", s+1); break;}
            }
        }

        if(navyse!=0)
        {printf("%c\n", chyba);}
        //----------------------------------koniec navyse!=0
    }
    return 0;
}