#include <iostream>

using namespace std;

int main() {
	int n;
	while(cin >> n) {
		string data[n];
		int chars[27];
		for(int i=0;i<27;++i) chars[i] = 0;
		for(int i = 0; i<n; ++i) {
			cin >> data[i];
			for(int j = 0; j<n; ++j) {
				chars[data[i][j]-'A']++;
			}
		}
		int missing = -1;
		int corr = -1;
		bool single = false;
		for(int i = 0; i<26;++i) {
			if(chars[i] == n-1) missing = i;
			else if(chars[i] == n+1) corr = i;
			else if(chars[i] == 1) {
				corr = i;
				single = true;
			}
		}
		if(single) {
			for(int i = 0; i<n; ++i) {
				for(int j = 0; j<n; ++j) {
					if(data[i][j]-'A' == corr) {
						cout << i+1 << " " << j+1 << " " << (char)(missing+'A') << endl;
					}
				}
			}
		} else {
			int i1 = -1;
			int i2 = -1;
			int row = -1;
			for(int i = 0; i<n; ++i) {
				int count = 0;
				for(int j = 0; j<n; ++j) {
					if(data[i][j]-'A' == corr) {
						if(count == 0) {
							i1 = j;
						} else {
							i2 = j;
						}
						count++;
					}
				}
				if(count > 1) {
					row = i;
					break;
				}
			}
			for(int i = 0; i<n; ++i) {
				if(i==row) continue;
				if(data[i][i1]-'A' == corr) {
					cout << row+1 << " " << i1+1 << " " << (char)(missing+'A') << endl;
				}
				else 
				if(data[i][i2]-'A' == corr) {
					cout << row+1 << " " << i2+1 << " " << (char)(missing+'A') << endl;
				}
			}
		}
	}

	return 0;
}