#include <bits/stdc++.h>
#define int long long
#define db double
#define PII pair <int, int>
#define ll unsigned long long
#define lson rt << 1
#define rson rt << 1 | 1
using namespace std;
const int N = 5010;
inline int read () {
    int w = 1, s = 0; char ch = getchar();
    for (; ! isdigit(ch); ch = getchar()) if (ch == '-') w = - 1;
    for (; isdigit(ch); ch = getchar()) s = (s << 1) + (s << 3) + (ch ^ 48);
    return s * w;
}
//bitset <N> bt[N];
void solve () {
    int n; cin >> n;
    vector <string> s (n);
    for (int i = 0; i < n; i ++) {
        cin >> s[i];
    }
    vector <int> ans;
    for (int i = 0; i < n; i ++) {
        int sum = 0;
        for (int j = 0; j < n; j ++) {
            if (i == j) continue;
            if (s[i][j] == '1') {
                sum ++; continue;
            }
            bool ok = 0;
            for (int k = 0; k < n; k ++) {
                if (s[i][k] == '1' && s[k][j] == '1') {
                    sum ++;
                    ok = 1;
                    break;
                }
            }
            if (! ok) break;
        }
        if (sum == n - 1) {
            ans.push_back (i);
            if (ans.size () == 3) {
                break;
            } 
        }
    }
    if (ans.size () < 3) {
        cout << "NOT FOUND"; return;
    }
    for (auto x : ans) cout << x + 1 << " ";
}
signed main () {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int TT = 1; 
//    TT = read ();
    while (TT --) solve ();
    return 0;
}