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

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 = true;
    for(auto ee: a){
      for(auto e: ee){
        if(e > 0) {
          b = false;
          cout << "infinite" << '\n';
          break;
        }
      }
      if(!b) break;
    }
    if(b) cout << "finite" << '\n';
  }
  return 0;
}