#include <iostream>
#include <vector>

using namespace std;

typedef struct person {
	uint32_t row;
	uint32_t column;
	char letter;
} Person;

void rozdilny(vector<Person *> & persons, int * pole, int n)
{
	int pismenoN = -1, pismenoT = -1;
	for (int i = 0; i < 26;++i)
	{
		if (pole[i] == 0) continue;
		
		if (pole[i] == 1) pismenoN = i;
		if (pole[i] == n - 1) pismenoT = i;
	}
	
	for (const auto & person : persons)
	{
		if (((int)person->letter) - 65 == pismenoN)
		{
			cout << (person->row + 1) << " " << (person->column + 1) << " " << (char)(pismenoT + 65) << endl;
			break;
		}
	}
}

Person *** matrix;

int stejny(vector<Person *> & persons, int * pole, int n)
{
	char wrong, right;
	for (int i = 0; i < 26;++i)
	{
		if (pole[i] == 0) continue;
		
		if (pole[i] == n + 1) wrong = (char)(i + 65);
		if (pole[i] == n - 1) right = (char)(i + 65); 
	}
	
	int radek = -1;
	int column1 = -1;
	int column2 = -1;
	
	for (int i = 0; i < n; ++i)
	{
		int column = -1;
		for (int j = 0; j < n; ++j)
		{
			if (wrong == matrix[i][j]->letter)
			{
				if (column == -1) column = j;
				else {
					column1 = column;
					column2 = j;
					radek = i;
					break;
				}
			}
		}
		if (column1 != -1) break;
	}
	
	int jetam = 0;
	for (int i = 0; i < n; ++i)
	{
		if (wrong == matrix[i][column1]->letter)
		{
			jetam++;
			if (jetam == 2)
			{
				cout << (matrix[radek][column1]->row + 1) << " " << (matrix[radek][column1]->column + 1) << " " << right << endl;
				return 0;
			}
		}
	}
	
	jetam = 0;
	for (int i = 0; i < n; ++i)
	{
		if (wrong == matrix[i][column2]->letter)
		{
			jetam++;
			if (jetam == 2)
			{
				cout << (matrix[radek][column2]->row + 1) << " " << (matrix[radek][column2]->column + 1) << " " << right << endl;
				return 0;
			}
		}
	}
}

int main(int argc, char ** argv)
{
	int n;
	while(cin >> n)
	{
		int pole[26]{0};
		int jednicka = 0;
		vector<Person *> persons;
		
		matrix = new Person**[n];
		for (int i = 0; i < n; ++i) matrix[i] = new Person*[n];

		for (int i = 0; i < n; ++i)
		{
			for (int j = 0; j < n; ++j)
			{
				Person * temp = new Person();

				cin >> temp->letter;
				temp->row = i;
				temp->column = j;

				pole[((int)temp->letter) - 65]++;
				if (pole[((int)temp->letter) - 65] == 1) jednicka++;
				if (pole[((int)temp->letter) - 65] == 2) jednicka--;
				
				persons.push_back(temp);
				matrix[i][j] = temp;
			}
		}

		if (jednicka == 1) rozdilny(persons, pole, n);
		else stejny(persons, pole, n);

		
		for (int i = 0; i < n; ++i) delete[] matrix[i];
		delete[] matrix;
	}

	return 0;
}