/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 *///
//package tribune;

//import java.io.BufferedReader;
import java.io.IOException;
//import java.io.InputStreamReader;
import java.util.Scanner;

/**
 *
 * @author tym13
 */
public class Tribune {

    //public static BufferedReader in2;
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {
        // TODO code application logic here
        
       //in2 = new BufferedReader(new InputStreamReader(System.in));
       Scanner in = new Scanner(System.in);
       while(true){
           int n = Integer.parseInt( in.nextLine());
           String[] rady = new String[n];
           for (int i = 0; i < n; i++) {
               rady[i] = in.nextLine();
           }
           
           int suma = 0;
           for(int i = 1; i <= n; i++)
               suma = suma + i;
           
           int[] abc = new int[26];
           for(int i = 0; i < n; i++) {
               for(int j = 0; j < n; j++) {
                   int index = (int)(rady[i].charAt(j)) - 65;
                   abc[index] = abc[index] + (i+1);
               }
           }
           
           int radka = 0;
           char pism = '1'; 
           char john = '1';
           
           for (int i = 0; i < abc.length; i++) {
               if (abc[i] == 3 && n == 3) {
                   radka = 3;
                   char pism2 = (char)(i + 65);
                   if (rady[2].indexOf(pism2) >= 0) {
                       john = pism2;
                   } else {
                       pism = pism2;
                   }
               } else if (abc[i] != 0 && abc[i] != suma) {
                   if (abc[i] > n) {
                       pism = (char)(i + 65);
                   } else {
                       radka = abc[i];
                       john = (char)(i + 65);
                   }
               }

           }
           //System.out.println(radka + " " + john + " "+ pism);
           int sloupec = rady[radka-1].indexOf(john) +1;
           
           System.out.println(radka + " " + sloupec + " "+ pism);
       }
    }
    
}