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

using namespace std;

char find(vector<string> &v, int a, int b) {
    int c = a+1;
    if(c == v.size()) c=0;
    for(int i = 0; i<v.size(); i++) {
        int seen = 0;
        for(int j = 0; j<v.size(); j++) {
            if(v[c][i] == v[a][j]) {
                seen=1;
            }
        }
        if(!seen){
            return v[c][i];
        }
    }
}

int main() {
    long long n;
    while(cin >> n) {
        string s;
        vector<string> v;
        for(int i = 0; i<n; i++) {
            cin >> s;
            v.push_back(s);
        }
        int bad1=0, bad2=0, bad3=0;
        for(int i = 0; i<n; i++) {
            vector<int> seen (126,0);
            for(int j = 0; j<n; j++) {
                if(seen[v[i][j]]) {
                    bad1=seen[v[i][j]];
                    bad2=j+1;
                    bad3=i;
                }
                seen[v[i][j]]=j+1;
            }
        }
        if(bad1 == 0) {
            vector<int> seen(126,0);
            for(int i = 0 ; i<n; i++) {
                for(int j = 0; j<n; j++) {
                    seen[v[i][j]]++;
                }
            }
            for(int i = 'A'; i<='Z'; i++) {
                if(seen[i]==1) {
                    for(int j = 0; j<n; j++) {
                        for(int k =0; k<n; k++) {
                            if(v[j][k]==i) {
                                cout << j+1 << " " << k+1 << " " << find(v, j, k) << endl;
                            }
                        }
                    }
                }
            }
        }
        else {
 //           cout << bad1 << " " << bad2 << " " << bad3 << endl; 
            for(int i = 0; i<n; i++) {
                if(v[i][bad1-1] == v[bad3][bad1-1] && bad3 != i) {
   //                 cout << " a \n";
                    cout << bad3+1 << " " << bad1 << " " << find(v, bad3, bad1-1) << endl;
                }
                if(v[i][bad2-1] == v[bad3][bad2-1] && bad3 != i) {
     //               cout << " b \n";
                    cout << bad3+1 << " " << bad2 << " " << find(v, bad3, bad2-1) << endl;
                }
            }
        }
    } 
}