#include <bits/stdc++.h>
using namespace std;

int readone(){
    int n, res = 0; cin >> n;
    while(n){
        res |= 1<<(n%10);
        n /= 10;
    }
    return res;
}

int main(){
    int n;
    while(scanf("%d", &n) == 1){
        vector<string> data;
        int frq[30];memset(frq, 0, sizeof(frq));
        for(int i = 0; i < n; i++){
            string a; cin >> a;                  
            for(int j = 0; j < n; j++){                
                frq[a[j]-'A'] ++;
            }                  
            data.push_back(a);
        }
        char bad, correct; bool twice = false;
        for(int i = 0; i < 26; i++){
            if(frq[i] == 1 ) 
                bad = i + 'A';
            if(frq[i] == n+1){
                bad = i + 'A';
                twice = true;
            }
            if(frq[i] == n - 1)
                correct = i + 'A';
        }
        
        if(twice){
            int fir = -1, sec;
            for(int i = 0; i < n; i++){
                fir = -1;
                for(int j = 0; j < n; j++){
                    if(data[i][j] == bad){
                        if( fir == -1 ){
                            fir = j;
                        } else {
                            sec = j;
                            int fitmp = 0, setmp = 0;
                            for(int k = 0; k < n; k++){
                                if(data[k][fir] == bad) fitmp ++;
                                if(data[k][sec] == bad) setmp ++;
                            }
                            if(fitmp == 2){
                                i ++; fir ++;
                                cout << i << ' ' << fir << ' ' << correct << endl;
                                
                            } else {
                                i ++; sec ++;
                                cout << i << ' ' << sec << ' ' << correct << endl;                                   
                            }
                            goto nextIter;
                        }
                    }
                }
            }
        } else {
            for(int i = 0; i < n; i++)
                for(int j = 0; j < n; j++){
                    if(data[i][j] == bad){
                        i++; j++;
                        cout << i << ' ' << j << ' ' << correct << endl;
                        goto nextIter;
                    }
                }            
       }

        nextIter:
        ;
    }
}