import java.io.*;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

/**
 * Created by cteam074 on 22.10.16.
 */
public class Tribune {
    public static void main(String[] args) throws FileNotFoundException {
//        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(new File("/home/cteam074/IdeaProjects/CTUOpen/src/input5.txt"))));

        List<String> list = new ArrayList<>();
        List<String> results = new ArrayList<>();
        in.lines().forEach(x -> list.add(x));

        while(!list.isEmpty()){
            int x = Integer.parseInt(list.remove(0));
            List<String> list1 = new ArrayList<>();
            Character[][] chars = new Character[x][x];
            Set<Character> charLine = new HashSet<>();
            int k = 0;
            int l = 0;
            for (int i = 0; i < x; i++) {
                String line = list.remove(0);
                list1.add(line);
                for(int j = 0; j < x; j++) {
                    chars[i][j] = line.charAt(j);
                }
            }
            for (int i = 0; i < x; i++) {
                if(list1.get(1).contains(chars[0][i].toString())){
                    charLine.add(chars[0][i]);
                }
                if(list1.get(2).contains(chars[1][i].toString())){
                    charLine.add(chars[1][i]);
                }
                if(list1.get(0).contains(chars[2][i].toString())){
                    charLine.add(chars[2][i]);
                }
            }
            for (int i = 0; i < x ; i++) {
                for (int j = 0; j < x ; j++) {
                    if(!charLine.contains(chars[i][j])){
                        k = i;
                        l = j;
                        break;
                    }
                }
            }
            for (int i = 0; i < x ; i++) {
                charLine.remove(chars[k][i]);
            }
            results.add(Integer.toString(k+1) + " " + Integer.toString(l+1) + " " + charLine.toArray()[0].toString());
        }
        results.forEach(x -> System.out.println(x));
    }
}