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

using ll = long long;
using ull = unsigned long long;
using ld = long double;
using pll = pair<ll, ll>;
using vll = vector<ll>;
using vpll = vector<pll>;

#define pb push_back
#define FOR(i, m, n) for (ll i(m); i < n; ++i)
#define REP(i, n) FOR(i, 0, n)
#define F(n) REP(i, n)
#define FF(n) REP(j, n)
#define FFF(n) REP(k, n)
#define D(x) cerr << "D(" << #x << "): " << x << endl
#define EPS (1e-10)
#define INF (1LL<<61)
#define CL(A, I) memset(A, I, sizeof(A))
#define all(x) begin(x), end(x)
#define IN(n) ll n; cin >> n;
#define x first
#define y second
void ga(ll N, ll* A){F(N) cin >> A[i];}

ll N;
ll rows[26];
ll cols[26];
string m[26];

int main(void)
{
    ios_base::sync_with_stdio(false);
    for(;;){
        cin>>N;
        if(!cin)break;
        CL(rows,0);CL(cols,0);
        F(N)cin>>m[i];
        F(N)FF(N){
            rows[i]|=(1<<(m[i][j]-'A'));
            cols[i]|=(1<<(m[j][i]-'A'));
        }
        ll corr=rows[0];
        if(rows[1]==rows[2])corr=rows[1];
        ll ii,jj;
        F(N){ if(rows[i]!=corr)ii=i; if(cols[i]!=corr)jj=i; }
        ll err=corr&~rows[ii];
        ll miss; F(26)if(err&(1<<i))miss=i;
        cout<<ii+1<<' '<<jj+1<< ' ' << (char)('A'+miss) <<endl;

    }
    return 0;
}