/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/* 
 * File:   tribn.cpp
 * Author: cteam081
 *
 * Created on 22. října 2016, 11:01
 */

#include <cstdlib>
#include <iostream>
#include <string>
#include <vector>

//#define DEBUG

using namespace std;

string normalize(string input) {
    string result = "..............................";
    for (char c : input) {
        result[c - 'A'] = c;
    }
    return result;
}

int main() {
    int lines;
    vector<string>map(26);
    vector<string>normal(26);
    while (cin >> lines) {
        // scan the map and calc their hashcodes
        for (int i = 0; i < lines; i++) {
            cin >> map[i];
            normal[i] = normalize(map[i]);
        }
        // search for a good hashcode
        string good;
        if (normal[0] == normal[1]) {
            good = normal[0];
        } else if (normal[0] == normal[2]) {
            good = normal[0];
        } else {
            good = normal[1];
        }
#ifdef DEBUG
        cout << "good pattern: " << good << endl;
#endif
        // search for a wrong hashcode
        int wrongRow;
        for (int i = 0; i < lines; i++) {
            if (normal[i] != good) {
                wrongRow = i;
                break;
            }
        }
#ifdef DEBUG
        cout << "wrong row: " << (wrongRow + 1) << endl;
#endif
        // search for incompatible character
        char missingColor = '-';
        char extraColor = '-';
        for (int i = 0; i < 26; i++) {
            if (normal[wrongRow][i] != good[i]) {
                if (good[i] != '.') {
                    missingColor = 'A' + i;
                } else {
                    extraColor = 'A' + i;
                }
            }
        }
        
#ifdef DEBUG
        cout << "missing color: " << missingColor << endl;
        cout << "extra color: " << extraColor << endl;
#endif
        

        if (extraColor != '-') {
            // we found somebody with an extra dress
            // search for his column
            int wrongCol;
            for (int i = 0; i < lines; i++) {
                if (map[wrongRow][i] == extraColor) {
                    wrongCol = i;
                    break;
                }
            }
            cout << (wrongRow + 1) << " " << (wrongCol + 1) << " " << missingColor << endl;
        } else {
            // we found two people with same dress
            // search column by column, which of them does not match the good hashcode
            // now check which dress is that.
            vector<int>possibleWrongCols(2);
            vector<int>found(26);
            char wrongColor;
            for(int i=0;i<lines;i++) {
                char c=map[wrongRow][i];
                if(found[c-'A']==0) {
                    found[c-'A']=i+1;
                }else{
                    possibleWrongCols[0]=found[c-'A']-1;
                    possibleWrongCols[1]=i;
                    wrongColor=c;
                }
            }
#ifdef DEBUG
            cout << "Possible wrong columns: " << possibleWrongCols[0] 
                    << " " << possibleWrongCols[1] << endl;
            cout << "Wrong color: " << wrongColor << endl;
#endif
            // we found two possibilities. Let's go through the rows
            for(int wrongCol : possibleWrongCols) {
                bool found=false;
                for(int i=0;i<lines;i++) {
                    if (i==wrongRow) continue;
                    if(map[i][wrongCol]==wrongColor) {
                        found=true;
                        break;
                    }
                }
                if(found) {
                    cout << (wrongRow + 1) << " " << (wrongCol+1) << " " << missingColor << endl;
                    break;
                } 
            }
        }
    }

    return 0;

}