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


public class Tribune {

	public static BufferedReader inp;
	public static void main(String[] args) throws IOException {
		inp = new BufferedReader (new InputStreamReader(System.in));
		String input;
		String[] retazce;
		int n;
		char dobry, zly;
		while ((input = inp.readLine()) != null){
			n = Integer.parseInt(input);
			retazce = new String[n];
			for (int i = 0; i < n; i++) {
				retazce[i] = inp.readLine();
			}
//			System.out.println(retazce[0]);
			if (zhoduju_sa(retazce[0],retazce[1])){
				int i,j;
				for(i = 2; i < n; i++) {
					if (!zhoduju_sa(retazce[0],retazce[i])){
						break;
					}
				}
				dobry = rozdiel_v(retazce[0], retazce[i]);
				zly = rozdiel_v_nesp(retazce[0], retazce[i]);
				for(j = 0; j < n; j++) {
					if (retazce[i].charAt(j) == zly) {
						break;
					}
				}
				i++;j++;
				System.out.println(i + " " + j + " " + dobry);
			}
			else if (zhoduju_sa(retazce[0],retazce[2])){
				int i,j;
//				for(i = 2; i < n; i++) {
//					if (!zhoduju_sa(retazce[0],retazce[i])){
//						break;
//					}
//				}
				
				dobry = rozdiel_v(retazce[0], retazce[1]);
				zly = rozdiel_v_nesp(retazce[0], retazce[1]);
				for(j = 0; j < n; j++) {
					if (retazce[1].charAt(j) == zly) {
						break;
					}
				}
				j++;
				System.out.println(2 + " " + j + " " + dobry);
			}
			else if (zhoduju_sa(retazce[1],retazce[2])){
				int i,j;
//				for(i = 2; i < n; i++) {
//					if (!zhoduju_sa(retazce[0],retazce[i])){
//						break;
//					}
//				}
				
				dobry = rozdiel_v(retazce[1], retazce[0]);
				zly = rozdiel_v_nesp(retazce[1], retazce[0]);
				for(j = 0; j < n; j++) {
					if (retazce[0].charAt(j) == zly) {
						break;
					}
				}
				j++;
				System.out.println(1 + " " + j + " " + dobry);
			}
		}

	}
	
	static boolean zhoduju_sa(String s1, String s2){
//		if (s2 == "") {
//			return false;
//		}
		int rozmer = 26;
		int[] pole1 = new int[rozmer];
		int[] pole2 = new int[rozmer];
		for (int i = 0; i < rozmer; i++){
			pole1[i] = 0;
			pole2[i] = 0;
		}
		int index; 
		char znak = ' ';
		for(int i = 0; i < s1.length(); i++) {
			znak = s1.charAt(i);
			index = znak - 'A';
			if (pole1[index] == 0) {
				pole1[index]++;
			}
		}
		for(int i = 0; i < s2.length(); i++) {
//			index = Integer.parseInt(s2.substring(i, i+1));
			znak = s2.charAt(i);
			index = znak - 'A';
			if (pole2[index] == 0) {
				pole2[index]++;
			}
		}
		for(int i = 0; i < rozmer; i++) {
			if (pole1[i] != pole2[i]) {
				return false;
			}
		}
		return true;
	}


	static char rozdiel_v(String s1, String s2){
		int rozmer = 26;
		int[] pole1 = new int[rozmer];
		int[] pole2 = new int[rozmer];
		for (int i = 0; i < rozmer; i++){
			pole1[i] = 0;
			pole2[i] = 0;
		}
		int index; 
		char znak;
		for(int i = 0; i < s1.length(); i++) {
//			index = Integer.parseInt(s1.substring(i, i+1));
			znak = s1.charAt(i);
			index = znak - 'A';
			if (pole1[index] == 0) {
				pole1[index]++;
			}
		}
		for(int i = 0; i < s2.length(); i++) {
//			index = Integer.parseInt(s2.substring(i, i+1));
			znak = s2.charAt(i);
			index = znak - 'A';
			if (pole2[index] == 0) {
				pole2[index]++;
			}
		}
		for(int i = 0; i < rozmer; i++) {
			if ((pole1[i] != pole2[i]) && (pole1[i] == 1)) {
				return (char) (i + 'A');
			}
		}
		return 'p';
	}
	
	static char rozdiel_v_nesp(String s1, String s2){
		int rozmer = 30;
		int[] pole1 = new int[rozmer];
		int[] pole2 = new int[rozmer];
		for (int i = 0; i < rozmer; i++){
			pole1[i] = 0;
			pole2[i] = 0;
		}
		int index; 
		char znak;
		for(int i = 0; i < s1.length(); i++) {
//			index = Integer.parseInt(s1.substring(i, i+1));
			znak = s1.charAt(i);
			index = znak - 'A';
//			System.out.println("pppp" + index+ "ap");
			if (pole1[index] == 0) {
				pole1[index]++;
			}
		}
		for(int i = 0; i < s2.length(); i++) {
//			index = Integer.parseInt(s2.substring(i, i+1));
			znak = s2.charAt(i);
			index = znak - 'A';
//			System.out.println("pppp" + index + "pp");
			if (pole2[index] == 0) {
				pole2[index]++;
			}
		}
		for(int i = 0; i < rozmer; i++) {
			if ((pole1[i] != pole2[i]) && (pole1[i] == 0)) {
//				System.out.println("bb" + (char) (i + 'A'));
//				return s2.charAt(i);
				return (char) (i + 'A');
			}
		}
		return 'p';
	}
}