1926B-VladAndShapes.cpp

#include <iostream>

int main(){

    std::ios_base::sync_with_stdio(false);

    long t; std::cin >> t;
    while(t--){
        long n; std::cin >> n;
        bool triangle(true); long prev(0);
        for(long row = 0; row < n; row++){
            std::string s; std::cin >> s;
            long ones(0);
            for(long col = 0; col < s.size(); col++){ones += (s[col] == '1');}
            if(ones > 0 && prev > 0 && ones == prev){triangle = false;}
            prev = ones;
        }

        std::cout << (triangle ? "TRIANGLE" : "SQUARE") << std::endl;
    }

}