def main():
    h, w = list(map(lambda x: int(x), input().split()))
    A = [list(map(int, input().split())) for _ in range(h)]
    N = min(h, w)
    for y in range(h):
        B = A[y][:]
        B.sort()
        if 0 < B[-2]+B[-1]:
            return 1
    for x in range(w):
        B = [A[y][x] for y in range(h)]
        B.sort()
        if 0 < B[-2]+B[-1]:
            return 1
    for t in range(-h+2, w-1):
        B = [A[y][y+t] for y in range(h) if 0 <= y+t < w]
        B.sort()
        if 0 < B[-2]+B[-1]:
            return 1
    for t in range(1, h+w-2):
        B = [A[y][t-y] for y in range(h) if 0 <= t-y < w]
        B.sort()
        if 0 < B[-2]+B[-1]:
            return 1
    return 0

for _ in range(int(input())):
    print("infinite" if main() else "finite")