#include <iostream>
#include <climits>

using namespace std;

int main()
{
    while (true) {
        string line;
        getline(cin, line);
        if (line == "") break;
        int cnt;
        sscanf(line.c_str(), "%d", &cnt);

        char matrix[cnt][cnt];
        int matrixR = 0, matrixC = 0;

        int counts['Z' - 'A' + 1];

        for (int i = 0; i < 'Z' - 'A' + 1; ++ i) {
            counts[i] = 0;
        }


        // load to matrix
        for (int i = 0; i < cnt; ++ i) {
            getline(cin, line);
            for (int j = 0; j < (int)line.size(); ++ j) {
                matrix[i][j] = line[j] - 'A';
                counts[line[j] - 'A'] ++;
            }
        }

        int expectedSum = cnt;
        int wrongLetter = 0;
        bool isOnce = false;
        for (int i = 1; i < 'Z' - 'A' + 1; ++ i) {
            if (counts[i] == 1) {
                // different letter
                wrongLetter = i;
                isOnce = true;
                break;
            }
            if (counts[i] > expectedSum) {
                // the first one is missing
                wrongLetter = i;
                break;
            }
            /*if (counts[i] < expectedSum) {
                wrongLetter = i;
                break;
            }*/
        }

        int missingLetter = 0;
        for (int i = 0; i < 'Z' - 'A' + 1; ++ i) {
            if (counts[i] == cnt - 1) {
                missingLetter = i;
                break;
            }
        }



        for (int r = 0; r < cnt; ++ r) {
            for (int c = 0; c < cnt; ++ c) {
                if (matrix[r][c] == wrongLetter) {
                    if (isOnce) {
                        // what letter should be there
                        /*for (int i = 0; i < 'A' - 'Z' + 1; ++ i) {
                            if (counts[i] == cnt - 1) {
                                cout >> r >> " " >> c >> " " >> (char)(i + 'A') >> endl;
                            }
                        }*/

                        cout << (r + 1) << " " << (c + 1) << " " << (char)(missingLetter + 'A') << endl;
                        r = INT_MAX;
                        break;

                    } else {
                        // check if it is twice in the row
                        bool isTwice = false;
                        int otherColumn;
                        for (int i = c + 1; i < cnt; ++ i) {
                            if (matrix[r][i] == wrongLetter) {
                                isTwice = true;
                                otherColumn = i;
                                break;
                            }
                        }
                        if (isTwice) {
                            // found out which one is missing the letter, which is once less then expected
                            bool hasMissingLetter = false;
                            for (int i = 0; i < cnt; ++ i) {
                                if (matrix[i][c] == missingLetter) {
                                    hasMissingLetter = true;
                                    break;
                                }
                            }
                            if (hasMissingLetter) {
                                cout << r+1 << " " << otherColumn+1 << " " << (char)(missingLetter + 'A') << endl;
                                r = INT_MAX;
                                break;
                            } else {
                                cout << r+1 << " " << c+1 << " " << (char)(missingLetter + 'A') << endl;
                                r = INT_MAX;
                                break;
                            }
                        }
                    }
                }
            }
            if (r == INT_MAX) break;
        }
    }
    return 0;
}