#nullable enable

#region
var (_input, _iter) = (Array.Empty<string>(), 0);
T I<T>() where T : IParsable<T>
{
    while (_iter >= _input.Length) (_input, _iter) = (Console.ReadLine()!.Trim().Split(' '), 0);
    return T.Parse(_input[_iter++], null);
}
#endregion

static T[] Range<T>(int n, Func<T> F) => Enumerable.Range(0, n).Select(_ => F()).ToArray();

bool R(int x1, int y1, int x2, int y2)
{
    if (x1 == x2 || y1 == y2) return true;
    if (x1 - y1 == x2 - y2) return true;
    if (x1 + y1 == x2 + y2) return true;
    return false;
}

bool Solve()
{
    var h = I<int>();
    var w = I<int>();
    var az = new int[h, w];
    for (var i = 0; i < h; i++) for (var j = 0; j < w; j++) az[i, j] = I<int>();
    for (var i = 0; i < h; i++) for (var j = 0; j < w; j++)
    {
        var a1 = az[i, j];
        for (var x = 0; x < h; x++) for (var y = 0; y < w; y++)
        {
            if ((i, j) == (x, y)) continue;
            if (!R(i, j, x, y)) continue;
            var a2 = az[x, y];
            if (a1 + a2 > 0) return false;
        }
    }
    return true;
}

var t = I<int>();
var ans = Range(t, () => Solve() ? "finite" : "infinite");
Console.WriteLine(string.Join(Environment.NewLine, ans));