func_code_string: #include <bits/stdc++.h>   using namespace std;   long long int a, b, c, d, n, ans = 0;   int main() {     cin >> a;     cin >> b;     cin >> c;     cin >> d;     if ((a + b > c && a + c > b && b + c > a) ||         (a + b > d && a + d > b && b + d > a) ||         (a + d > c && a + c > d && d + c > a) ||         (d + b > c && d + c > b && b + c > d)) {       cout <<  TRIANGLE ;     } else if ((a + b == c) || (a + b == d) || (a + c == b) || (a + c == d) ||                (a + d == c) || (a + d == b) || (b + c == a) || (b + c == d) ||                (b + d == a) || (b + d == c) || (c + d == a) || (c + d == b)) {       cout <<  SEGMENT ;     } else {       cout <<  IMPOSSIBLE ;     }     return 0;   }   