import java.util.Scanner;

public class Tribune {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        while (sc.hasNextInt()) {
            int n = sc.nextInt();
            
            int[] poc = new int[27];
            int[] x = new int[27];
            int[] y = new int[27];
            
            for (int i = 0; i < n; i++) {
                String s = sc.next();
                for (int k = 0; k < n; k++) {
                    int index = (int)(s.charAt(k) - 'A');
                    poc[index]++;
                    x[index] = k;
                    y[index] = i;
                }
            }
            
            int i1 = 0, i2 = 0;
            n--;
            for (int i = 0; i < 27; i++) {
                if (poc[i] == 1) {
                    i1 = i;
                }
                if (poc[i] == n) {
                    i2 = i;
                }
                
            }
            System.out.println((y[i1] + 1) + " " + (x[i1] + 1) + " " + (char)('A' + i2));
        }
    }
}