#include <stdio.h>
#include <iostream>
#include <stdlib.h>
#include <set>
#include <string.h>

int main()
{
int N;
	while(scanf("%d",&N) > 0)
	{
		int r=0 ,l=0;

		char line[N][N+1];		
		for(int i = 0; i < N; i++)
		{
			scanf("%s",line[i]);
		}

		int *sumR = (int*) calloc(N,sizeof(int));
		int *sumS = (int*) calloc(N,sizeof(int));
		int total[26] = {0};		
		int rt = -1;
		for(int x = 0; x < N; x++)
		{
			for (int y = 0; y < N; y++)
				{
					sumR[x] += line[x][y];
					sumS[y] += line[x][y];					
					total[line[x][y] - 'A']++;				
			}
			if(x > 1)
			{
			int a,b,c;
			if(rt !=-1)	continue;
				
			a = sumR[x-2];
			b = sumR[x-1];
			c = sumR[x];
			if((a==b) && (a==c)) 
				rt = a;
			else if ((a !=b ) && (b==c))
				rt = b;
			else if((a!=c ) && (a==b))
				rt = a;
			else if((a!=b) && (a==c))
				rt = c;

		}
	}
	
	int a = 0;
	for (int i =0; i < 26; i++)
{
	if(total[i] == N - 1)
	{
		a = i + 'A';
		break;	
}
}

	
	for (int i = 0; i < N; i++)
	{
		if(sumR[i] != rt)
			r = i+1;
		if(sumS[i] != rt)
			l = i+1;
	}
	printf("%d %d %c\n",r,l,a);

	/*printf(">%d<\n",rt);
	for(int i = 0; i < N; i++)
		printf("%d %d\n",sumR[i],sumS[i]);
	for(int i = 0; i < 26; i++)
		printf("%c = %d\n",'A' + i,total[i]);
*/
	}


	return 0;
}