//uva1594 #include<iostream> #include<cstdio> #include<cmath> using namespace std; int main() { int n, s[20], t; int i, j, temp, k; cin >> n; while(n--) { cin >> t; for (i = 0; i < t; i++) cin >> s[i]; for (i = 0; i < 1000; i++) { for (j = 0, temp = s[0]; j < t-1 ; j++) s[j] = abs(s[j] - s[j+1]); s[j] = abs(s[j] - temp); } for (i = 0, k = 0; i < t; i++){ if (s[i] != 0){ k = 1; break; } } if (k == 0) cout << "ZERO" << endl; else cout << "LOOP" << endl; } return 0; }