#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));
        int eri = -1, erj = -1;
        for(int i = 0; i < n; i++){
            string a; cin >> a;
            bool C[30];            
            memset(C, 0, sizeof(C));
            for(int j = 0; j < n; j++){
                if(C[a[j]-'A']){
                    eri = i; 
                    erj = j;
                }
                C[a[j]-'A'] = 1;
                frq[a[j]-'A'] ++;
            }                  
            data.push_back(a);
        }
        char bad, correct;
        for(int i = 0; i < 26; i++){
            if(frq[i] == 1)
                bad = i + 'A';
            if(frq[i] == n - 1)
                correct = i + 'A';
        }
        if(eri == -1){           
            for(int i = 0; i < n; i++)
                for(int j = 0; j < n; j++){
                    if(data[i][j] == bad){
                        eri = i; erj = j;
                    }
                }
             
        } 
        eri ++; erj ++;
        cout << eri << ' ' << erj << ' ' << correct << endl;
    }
}