for _ in range(int(input())):
    h, w = map(int, input().split())
    a = [list(map(int, input().split())) for _ in range(h)]
    dh = [[-10 ** 9] * 3 for _ in range(h)]
    dw = [[-10 ** 9] * 3 for _ in range(w)]
    for i in range(h):
        for j in range(w):
            dh[i][0] = a[i][j]
            dw[j][0] = a[i][j]
            dh[i].sort()
            dw[j].sort()
    ans = max(d[1] + d[2] for d in dh) <= 0 and max(d[1] + d[2] for d in dw) <= 0
    print('finite' if ans else 'infinite')