import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;


public class Tribune {

	/**
	 * @param args
	 */
	static String[] retazce;
	static int n;
	static char matica[][];
	static int abeceda = 26;
	static int register_znakov[] = new int[abeceda];
	
	public static BufferedReader inp;
	public static void main(String[] args) throws IOException {
		inp = new BufferedReader (new InputStreamReader(System.in));
		String input;
		char chybajuci = 0;
		while ((input = inp.readLine()) != null){
			n = Integer.parseInt(input);
			retazce = new String[n];
			matica = new char[n][n];
			for (int i = 0; i < n; i++) {
				retazce[i] = inp.readLine();
			}
			for(int i = 0; i < n; i++){
				for(int j = 0; j < n; j++) {
					matica[i][j] = retazce[i].charAt(j);
//					System.out.print(matica[i][j]);
				}
//				System.out.println();
			}
			for(int i = 0; i < n; i++){
				for(int j = 0; j < n; j++) {
					register_znakov[retazce[i].charAt(j) - 'A']++;
				}
			}
			for(int i = 0; i < abeceda; i++) {
				if (register_znakov[i] != n) {
					if (register_znakov[i] == (n-1)) {
						chybajuci = (char) (i+'A'); 
					}
				}
			}

			for(int i = 0; i < abeceda; i++) {
				if (register_znakov[i] != n) {
					if (register_znakov[i] == 1) {
						hladaj((char) (i+'A'));
					}
					if (register_znakov[i] == (n + 1)) {
						hladaj2(chybajuci);
					}
				}
			}
			System.out.println(" " + chybajuci);
			matica = new char[n][n];
			for(int i = 0; i < abeceda; i++) {
				register_znakov[i] = 0;
			}	
		}
		

	}
	
	static void hladaj(char znak) {
		for (int i = 0; i < n; i++) {
			for (int j = 0; j < n; j++){
				if (znak == matica[i][j]){
					System.out.print((i+1) + " " + (j+1));
				}
			}
		}
	}
	
	static void hladaj2(char chybajuci) {
		boolean je_tam = false;
		int x = 0, y = 0;
		for (int i = 0; i < n; i++) {
			je_tam = false;
			for (int j = 0; j < n; j++){
				if (chybajuci == matica[i][j]){
					je_tam = true;
				}
			}
			if (je_tam == false) {
				x = i;
			}
		}	
		for (int i = 0; i < n; i++) {
			je_tam = false;
			for (int j = 0; j < n; j++){
				if (chybajuci == matica[j][i]){
					je_tam = true;
				}
			}
			if (je_tam == false) {
				y = i;
			}
		}
		System.out.print((x+1) + " " + (y+1));
//		int[][] mriezka = new int[n+1][2];
//		int counter = 0;
//		for (int i = 0; i < n; i++) {
//			for (int j = 0; j < n; j++){
//				if (znak == matica[i][j]){
//					mriezka[counter][0] = i;
//					mriezka[counter][1] = j;
//					counter++;
////					System.out.println((i+1) + " " + (j+1));
//				}
//			}
//		}
//		int row, col;
//		for (int i = 0; i < (n+1); i++) {
//			for (int j = (i + 1); j < (n+1); j++){
//				if (mriezka[i][0] == mriezka[j][0]){
//					row = i;
//				}
//			}
//		}
		
	}

}