/*
     * 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) {
            // TODO code application logic here

           //in2 = new BufferedReader(new InputStreamReader(System.in));
           Scanner in = new Scanner(System.in);
           while(in.hasNext()){
               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';
               int sloupec;
               boolean zevz = false;
               for (int i = 0; i < abc.length; i++) {
                   if (abc[i] > suma) {
                       zevz = true;
                   }
               }

               if (zevz) {

                   for (int i = 0; i < abc.length; i++) {
                        
                        if (abc[i] != 0 && abc[i] != suma) {
                            if (abc[i] < suma) {
                                pism = (char)(i + 65);
                            } else {
                                radka = abc[i] - suma;
                                john = (char)(i + 65);
                            }
                        }

                    }
                   
                   int prvni = rady[radka-1].indexOf(john);
                   int druhy = rady[radka-1].lastIndexOf(john);
                   int mam = 0;
                   for (int k = 0; k < n; k++) {
                       if (rady[k].charAt(prvni) == john) {
                           mam++;
                       }
                   }
                   if (mam == 2) {
                       sloupec = prvni+1;
                   } else
                       sloupec = druhy+1;
                   
                   //System.out.println(sloupec);
               } else {


                    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);
                            }
                        }

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

               System.out.println(radka + " " + sloupec + " "+ pism);
           }
        }

    }