#include <iostream>
#include <string>

struct Point
{
	Point(int xx, int yy)
{
	x = xx;
	y = yy;
}
	int x, y;
};

int main()
{
	int n;

	while ( std::cin >> n )
	{
		int c[30] = {};
		int posx[30] = {};
		int posy[30] ={};
		for ( int i=0; i <n; i++ )
		{
			std::string line;
			std::cin >> line;
			int dresy[30] = {};
				
			for ( unsigned int j=0;j<line.size(); j++)
			{
				dresy [ line[j] - 'A' ] += 1;
				c[ line[j] - 'A' ] += 1;
				if ( dresy [ line[j] - 'A' ] > 1 || c[ line[j] - 'A' ] == 1)
				{
					posx[line[j] - 'A'] = i;
					posy[line[j] - 'A'] = j;
				}
			}
		}
		for ( int i = 0; i<27; i++ )
		{
			if (c[i] == 1 || c[i] == n+1 )
				std::cout << posx[i]+1 << " " << posy[i]+1 << " ";
			/*if (c[i] > max )
			{
				last_max_pos = max_pos;
				max_pos = i;
				max = c[i];
			}*/
			
				
		}	
		for ( int i = 0; i<27; i++ )
		{
			if (c[i] == n-1)			
				std::cout << (char)(i + 'A')  << std::endl;
		}

	}
	
}