from collections import defaultdict
T=int(input())
for _ in range(T):
    H,W=map(int,input().split())
    A=[]
    for _ in range(H):
        A.append(list(map(int,input().split())))
    inf = 10**18
    x = defaultdict(lambda:-inf)
    y = defaultdict(lambda:-inf)
    xpy = defaultdict(lambda:-inf)
    xsy = defaultdict(lambda:-inf)
    ans = -1
    for i in range(H):
        for j in range(W):
            ans = max(ans, A[i][j] + x[i])
            x[i] = max(x[i],A[i][j])
            ans = max(ans, A[i][j] + y[j])
            y[j] = max(y[j],A[i][j])
            ans = max(ans, A[i][j] + xpy[i+j])
            xpy[i+j] = max(xpy[i+j],A[i][j])
            ans = max(ans, A[i][j] + xsy[i-j])
            xsy[i-j] = max(xsy[i-j],A[i][j])
    if ans > 0:
        print("infinite")
    else:
        print("finite")