/* 
 * File:   tribune.cpp
 * Author: cteam038
 *
 * Created on October 22, 2016, 9:29 AM
 */

#include <cstdlib>
#include <vector>
#include <iostream>
#include <algorithm>

int setBit(int bits){
    for (int i = 0; i < 31; ++i){
        if (bits & (1 << i)){
            return i;
        }
    }
}

/*
 * 
 */
int main(int argc, char** argv) {
    std::ios_base::sync_with_stdio(false);
    int team_size;
    while (std::cin >> team_size){
        std::cin.ignore(100, '\n');
        std::string team_line;
        std::vector<int> line_ids(team_size);
        std::vector<int> column_ids(team_size);
        std::vector<std::string> field;
        int diff_line = -1;
        int diff_column = -1;
        char correct_letter = '\'';
        int teams = 0;
        int tmp;
        for (int t = 0; t < team_size; ++t){
            std::getline(std::cin, team_line);
            for (int i = 0; i < team_size; ++i){
                int move_by = team_line[i] - 'A';
                line_ids[t] ^= (1 << move_by);
                column_ids[i] ^= (1 << move_by);
                teams |= (1 << move_by);
            }
            field.push_back(team_line);
        }
            int c = std::count(line_ids.begin(), line_ids.end(), line_ids[0]);
            if (c == 1){
                diff_line = 0;
                tmp = line_ids[0] | line_ids[1];
                tmp ^= line_ids[0];
                
                correct_letter = 'A' + setBit(tmp);
                
            } else {
                for (int i = 1; i < team_size; ++i){
                    if (line_ids[0] != line_ids[i]){
                        diff_line = i;
                        tmp = line_ids[0] | line_ids[i];
                        tmp ^= line_ids[i];
                        correct_letter = 'A' + setBit(tmp);
 
                        break;
                    }
                }
            }
            c = std::count(column_ids.begin(), column_ids.end(), column_ids[0]);
            if (c == 1){
                diff_column = 0;
            } else {
                for (int i = 1; i < team_size; ++i){
                    if (column_ids[0] != column_ids[i]){
                        diff_column = i;
                        break;
                    }
                }
            }
            if (field[diff_line][diff_column] == correct_letter){
                // incorrect answer, we need to check next set  bit
                tmp ^= (1 << setBit(tmp)); 
                correct_letter = 'A' + setBit(tmp);// get next;
            }
        std::cout << diff_line + 1 << ' ' << diff_column + 1 << ' ' << correct_letter << '\n';
    }
    return 0;
}