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

void solve(){
	auto f=[&](int i1,int j1,int i2,int j2){
		int di=abs(i1-i2),dj=abs(j1-j2);
		if (di==0&&dj==0) return false;
		if (di==0||dj==0||di==dj) return true;
		return false;
	};
	int h,w;
	cin>>h>>w;
	vector<vector<int>> a(h,vector<int>(w));
	for (int i=0;i<h;i++) for (int j=0;j<w;j++) cin>>a[i][j];
	int m=-2e9;
	for (int i1=0;i1<h;i1++) for (int j1=0;j1<w;j1++)
		for (int i2=0;i2<h;i2++) for (int j2=0;j2<w;j2++){
			if (f(i1,j1,i2,j2)){
				m=max(m,a[i1][j1]+a[i2][j2]);
			}
		}
	if (m>0) cout<<"infinite\n";
	else cout<<"finite\n";
}

int main(){
	int t;
	cin>>t;
	while (t--) solve();
}