/u/Dragonfliesfoos222

#include <iostream>
#include <utility>
#include <set>
#include <vector>
#include <string>

using namespace std;

bool has_partner(vector<string> &matrix, vector< vector<bool> > &partners,
         int row, int col, int width, int height)
{
    char base = matrix[row][col];
    if (partners[row][col]) {
        return true;
    }
    else {
        // check (row + 1, col)
        if (row < (height - 1) && (base == matrix[row + 1][col])) {
            partners[row + 1][col] = true;
            partners[row][col] = true;
        }
        // check (row, col + 1)
        if (col < (width - 1) && (base == matrix[row][col + 1])) {
            partners[row][col + 1] = true;
            partners[row][col] = true;
        }
        // check (row - 1, col)
        if (row > 0 && (base == matrix[row - 1][col])) {
            partners[row - 1][col] = true;
            partners[row][col] = true;
        }
        // check (row, col - 1)
        if (col > 0 && (base == matrix[row][col - 1])) {
            partners[row][col - 1] = true;
            partners[row][col] = true;
        }
        // check (row + 1, col + 1)
        if (row < (height - 1) && col < (width - 1) &&
            (base == matrix[row + 1][col + 1])) {
            partners[row + 1][col + 1] = true;
            partners[row][col] = true;
        }
        // check (row - 1, col - 1)
        if (row > 0 && col > 0 && (base == matrix[row - 1][col - 1])) {
            partners[row - 1][col - 1] = true;
            partners[row][col] = true;
        }
        // check (row + 1, col - 1)
        if (row < (height - 1) && col > 0 &&
            (base == matrix[row + 1][col - 1])) {
            partners[row + 1][col - 1] = true;
            partners[row][col] = true;
        }
        // check (row - 1, col + 1)
        if (row > 0 && col < (width - 1) &&
            (base == matrix[row - 1][col + 1])) {
            partners[row - 1][col + 1] = true;
            partners[row][col] = true;
        }
    }
    return partners[row][col];
}

int main()
{
    string s;
    vector<string> matrix;
    vector< pair<int, int> > uniques;

    while (cin >> s) {
        matrix.push_back(s);
    }

    auto height = matrix.size();
    auto width = matrix[0].size();

    vector< vector<bool> > partners(height, vector<bool>(width, false));

    for (int row = 0; row != height; ++row) {
        for (int col = 0; col != width; ++col) {
            if (has_partner(matrix, partners, row, col, width,
                    height))
                continue;
            else
                uniques.push_back(make_pair(row, col));
        }
    }

    if (uniques.size() > 0) {
        cout << "UNIQUES:" << endl;
        for (auto &p : uniques) {
            cout << matrix[p.first][p.second] << " at "
                 << "(" << p.first << ", " << p.second
                 << ")" << endl;
        }
    }
    else {
        cout << "NO UNIQUES" << endl;
    }

    return 0;
}