# https://yukicoder.me/problems/no/3596

def same_line(h0, w0, h1, w1):
    if h0 == h1 or w0 == w1:
        return True
    elif h0 - w0 == h1 - w1:
        return True
    elif h0 + w0 == h1 + w1:
        return True
    return False

def solve(H, W, A):

    for index0 in range(H * W):
        for index1 in range(index0 + 1, H * W):
            h0 = index0 // W
            w0 = index0 % W
            h1 = index1 // W
            w1 = index1 % W
            if same_line(h0, w0, h1, w1):
                a0 = A[h0][w0]
                a1 = A[h1][w1]
                v = a0 + a1
                if v > 0:
                    return "infinite"
    return "finite"




def main():
    T = int(input())
    answers = []
    for _ in range(T):
        H, W = map(int, input().split())
        A = []
        for _ in range(H):
            A.append(list(map(int, input().split())))

        ans = solve(H, W, A)
        answers.append(ans)

    for ans in answers:
        print(ans)






if __name__ == "__main__":
    main()