import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

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

    /**
     * @param args the command line arguments
     */
    private static int poc;
    private static String[] arr;
    private static char targeted;
    
    public static void main(String[] args) throws IOException {
        // TODO code application logic hereň
        BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
                String line;
        
        while((line = input.readLine() )!=null){
            poc = Integer.parseInt(line);
            int[] tmp = new int[30];
            arr = new String[poc];
            for (int i = 0; i < poc; i++) {
                line = input.readLine();
                arr[i] = line;
                for (int j = 0; j < poc; j++) {
                    tmp[line.charAt(j)-'A']++;
                }
                
            }
            for (int i = 0; i < tmp.length; i++) {
                if(tmp[i] == poc-1)targeted = (char)('A'+i);
            }
            for (int i = 0; i < tmp.length; i++) {
                //if(tmp[i] == poc-1)targeted = (char)('A'+i);
              //  System.out.println(tmp[i]);
                if(tmp[i] > poc){
                    najdiViac(i);
                    break;
                }else{
                    if(tmp[i] == 1){
                        najdiJedno(i);
                        break;
                    }
                }
            }
            
            
        }
    }

    private static void najdiJedno(int target) {
        
        for (int i = 0; i < poc; i++) {
            for (int j = 0; j < poc; j++) {
                if(arr[i].charAt(j)-'A' == target){
                    System.out.println((i+1)+" "+(j+1)+" "+targeted);
                    return;
                }
            }
        }
        
    }

    private static void najdiViac(int target) {
       for (int i = 0; i < poc; i++) {
           int counter = 0;
            for (int j = 0; j < poc; j++) {
                if(arr[i].charAt(j)-'A' == target){
                    
                    counter++;
                    
                }
            }
            if(counter == 2){
                for (int j = 0; j < poc; j++) {
                    if(arr[i].charAt(j)-'A' == target){
                        int c = 0;
                        for (int k = 0; k < poc; k++) {
                            if(arr[k].charAt(j)-'A' == target){
                                c++;
                            }
                        }
                        if(c == 2){
                            System.out.println((i+1)+" "+(j+1)+" "+targeted);
                            return;
                        }
                    }
                }
               
                return;
            }
        }
        
    }

    
    
}