#include <iostream>
using namespace std;
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(NULL);
 
    int t;
    cin >> t;
 
    while (t--) {
        bool flag = false;
        int n;
        cin >> n;
        int arr[n][n];
 
        for (int i = 0; i < n; i++) {
            int count = 0;
            for (int j = 0; j < n; j++) {
                cin >> arr[i][j];
                if (arr[i][j] == 1) {
                    count++;
                }
            }
            if (count == 1) {
                flag = true;
                cout << "TRIANGLE\n";
                break;
            }
        }
       if (!flag) {
           cout <<  "SQUARE"<< endl;
       }
    }
 
    return 0;
}
 

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