#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main(){
  ios::sync_with_stdio(false);
  cin.tie(0);
  int t; cin >> t;
  while(t--){
    int h, w; cin >> h >> w;
    vector<vector<int>> a(h, vector<int>(w));
    for(auto &&ee: a){
      for(auto &&e: ee) cin >> e;
    }
  bool b = false;
  for(int i = 0; i < h; ++i){
    for(int j = 0; j < w; ++j){
      //縦
      for(int k = 0; k < h; ++k){
        if(i == k) continue;
        if(a[i][j] + a[k][j]> 0){
          cout << "infinite" << '\n';
          b = true;
          break;
        }
      }
      if(b) break;
      
      //横
      for(int k = 0; k < w; ++k){
        if(j == k) continue;
        if(a[i][j] + a[i][k] > 0){
          cout << "infinite" << '\n';
          b = true;
          break;
        }
      }
      if(b) break;
      
      //左上から斜め右下
      int c = 1;
      while(i+c<h && j+c<w){
        if(a[i][j] + a[i+c][j+c] > 0){
          cout << "infinite" << '\n';
          b = true;
          break;
        }
        ++c;
      }
      if(b) break;
      c = 1;
      while(i-c>=0 && j-c>=0){
        if(a[i][j] + a[i-c][j-c] > 0){
          cout << "infinite" << '\n';
          b = true;
          break;
        }
        ++c;
      }
      if(b) break;

      //右上から斜め左下
      c = 1;
      while(i+c<h && j-c>=0){
        if(a[i][j] + a[i+c][j-c] > 0){
          cout << "infinite" << '\n';
          b = true;
          break;
        }
        ++c;
      }
      if(b) break;
      c = 1;
      while(i-c>=0 && j+c<w){
        if(a[i][j] + a[i-c][j+c] > 0){
          cout << "infinite" << '\n';
          b = true;
          break;
        }
        ++c;
      }
      if(b) break;
    }
    if(b) break;
  }
  if(!b) cout << "finite" << '\n';
  }
  return 0;
}