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

int main(){
	int t;
	cin >> t;
	while(t--){
		bool infinite = 0, all_neg = 1;
		int h,w;
		cin >> h >> w;
		for(int i = 0; i < h; i++) for(int j = 0; j < w; j++){
			int a;
			cin >> a;
			if(a > 0) infinite = 1;
			if(a >= 0) all_neg = 0;
		}
		
		infinite |= all_neg;
		
		cout << (infinite ? "infinite" : "finite") << endl;
	}
}