import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.stream.IntStream;

/**
 *
 * @author tym11
 */
public class tribune {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        
        for(;;) {
            String s = in.readLine();
            if (s == null) break;
            
            int n = Integer.valueOf(s);
            char[][] trib = new char[n][];
            for (int i = 0; i < n; ++i) {
                trib[i] = in.readLine().toCharArray();
            }
            
            solve(trib);
        }
    }

    private static void solve(char[][] trib) {
        int n = trib.length;
        int[] cnt = new int[26];
        
        for (char[] a: trib) {
            for (char c: a) {
                cnt[(c - 'A')]++;
            }
        }
        
        for (int r = 0; r < n; ++r) {
            for (int c = 0; c < n; ++c) {
                char x = trib[r][c];
                if (cnt[(x - 'A')] == 1) {
                    int y = -1;
                    for (int k = 0; k < cnt.length; ++k) {
                        if (cnt[k] == n - 1) {
                            y = k;
                            break;
                        }
                    }
                    System.out.println((r + 1) + " " + (c + 1) + " " + (char)(y + 'A'));
                    return;
                }
            }
        }       
        
        
        
        int row = -1;
        for (int i = 0; i < n; ++i) {
            int mask = 0;
            for (char c: trib[i]) {
                int b = c - 'A';
                int x = 1 << b;
                if ((mask & x) != 0) {
                    row = i;
                    break;
                }
                mask |= x;
            }
            if (row != -1) 
                break;
        }
        
        int col = -1;
        for (int i = 0; i < n; ++i) {
            int mask = 0;
            for (int j = 0; j < n; ++j) {
                char c = trib[j][i];
                int b = c - 'A';
                int x = 1 << b;
                if ((mask & x) != 0) {
                    col = i;
                    break;
                }
                mask |= x;
            }
            if (col != -1) 
                break;
        }
        
        int y;
        for (int k = 0; k < cnt.length; ++k) {
            if (cnt[k] == n - 1) {
                y = k;
                System.out.println((row + 1) + " " + (col + 1) + " " + (char)(y + 'A'));
                break;
            }
        }
    }
    
}