#include <iostream>
#include <set>

using namespace std;

int main ( void )
{
	unsigned int size;
	while ( cin >> size )
	{
		unsigned int badrow = 0;
		char c;
		set <char> first;
		set <char> second;
		set <char> clubs;
		char ** table = new char * [ size ];
		for ( unsigned int i = 0 ; i < size ; i ++ )
			table [ i ] = new char [ size ];
		for ( unsigned int i = 0 ; i < size ; i ++ )
		{
			cin >> c;
			table [ 0 ][ i ] = c;
			if ( first . count ( c ) )
				badrow = 0;
			first . insert ( c );
		}
		for ( unsigned int i = 0 ; i < size ; i ++ )
		{
			cin >> c;
			table [ 1 ][ i ] = c;
			if ( second . count ( c ) )
				badrow = 1;
			second . insert ( c );
			if ( first . count ( c ) )
				clubs . insert ( c );
			else
				badrow = 1;
			
		}
		for ( unsigned int i = 0 ; i < size ; i ++ )
		{
			set <char> row;
			cin >> c;
			table [ 2 ][ i ] = c;
			if ( row . count ( c ) )
				badrow = 2; 
			row . insert ( c );
			if ( first . count ( c ) || second . count ( c ) )
				clubs . insert ( c );
			else
				badrow = 2;
				
		}
		for ( unsigned int i = 3 ; i < size ; i ++ )
		{
			set <char> row;
			for ( unsigned int j = 0 ; j < size ; j ++ )
			{
				cin >> c;
				table [ i ][ j ] = c;
				if ( row . count ( c ) )
					badrow = i; 
				if ( !clubs . count ( c ) )
					badrow = i;
				row . insert ( c );
			}
		}
		/*
		for ( unsigned int i = 0 ; i < size ; i ++ )
		{
			for ( unsigned int j = 0 ; j < size ; j ++ )
			{
				cout << table [ i ][ j ];
			}
			cout << endl;
		}
		*/
		if ( badrow < 3 )
		{
			int bad = 0;
			set <char> row;
			for ( unsigned int i = 0 ; i < size ; i ++ )
			{
				if ( row . count ( table [ badrow ][ i ] ) )
					bad = badrow;
				if ( !clubs . count ( table [ badrow ][ i ] ) )
					bad = badrow;
				row . insert ( table [ badrow][ i ] );
			}
			badrow = bad;
		}
		int badcolumn = -1;
		char badclub = 0;

		set <char> row;
		for ( unsigned int i = 0 ; i < size ; i ++ )
		{
			if ( row . count ( table [ badrow ][ i ] ) )
			{
				for ( unsigned int j = 0 ; j < size ; j ++ )
				{
					if ( table [ j ][ i ] == table [ badrow ][ i ] && badrow != j )
						badcolumn = i;
				}
				if ( badcolumn == -1 )
				{
				badcolumn = 0;
				for ( unsigned int j = 0 ; j < i ; j ++ )
				{
					if ( table [ badrow ][ j ] == table [ badrow ][ i ] )
						badcolumn = j;
				}
				}
			}
			row . insert ( table [ badrow ][ i ] );
			if ( ! clubs . count ( table [ badrow ][ i ] ) )
			{
				badcolumn = i;
			}
		}

		for ( set<char>::iterator it = clubs.begin(); it != clubs.end(); ++it )
		{
			if ( !row . count ( *it ) )
				badclub = *it;
		}
		cout << badrow + 1 << " " << badcolumn + 1 << " " << badclub << endl;
		
		for ( unsigned int i = 0 ; i < size ; i ++ )
			delete [] table [ i ];
		delete [] table;
	}
	
	return 0;
}