#include <iostream>
#include <string>
#include <vector>

using namespace std;

vector<string> input;
vector<int> nums('Z'-'A'+1, 0);

int f1() {
	for (int i=0; i<input.size(); i++)
		for (int j=0; j<input[i].size(); j++)
			nums[input[i][j]-'A']++;
}

int f2() {
	for (int i=0; i<nums.size(); i++) 
		if (nums[i]==input.size()-1) return i;
	return 42;
}

int f3() {
	for (int i=0; i<nums.size(); i++) 
		if (nums[i]==input.size()+1 || nums[i]==1) return i;
	return 42;
}

bool row_twice(int r, int what) {
	int ans=0;
	for (int i=0; i<input[r].size(); i++) if (input[r][i]-'A'==what) ans++;
	if (ans==2) return true;
	else return false;
}

bool col_twice(int c, int what) {
	int ans=0;
	for (int i=0; i<input.size(); i++) if (input[i][c]-'A'==what) ans++;
	if (ans==2) return true;
	else return false;
}

int main() {
	int n;
	while (cin>>n) {
		input.clear();
		nums.clear();
		input.resize(n);
		nums.resize('Z'-'A'+1, 0);
		for (int i=0; i<n; i++) cin>>input[i];
		f1();
		int miss = f2();
		int over = f3();
		
		int ans_r=42, ans_c=42;
		
		for (int r=0; r<input.size(); r++) {
			for (int c=0; c<input[r].size(); c++) {
				if (input[r][c]-'A'==over) {
					if (nums[input[r][c]-'A']==1) ans_r=r+1, ans_c=c+1;
					else {
						if (row_twice(r, over) && col_twice(c, over)) ans_r=r+1, ans_c=c+1;
					}
				}
			}
		}
		
		cout<<ans_r<<" "<<ans_c<<" "<<(char)(miss+'A')<<endl;
	}
	
	return 0;
}