import sys
input = sys.stdin.readline

T=int(input())

for tests in range(T):
    H,W=list(map(int,input().split()))

    A=[list(map(int,input().split())) for i in range(H)]

    flag=0

    for i in range(H):
        X=sorted(A[i],reverse=True)

        if X[0]+X[1]>0:
            flag=1

    for j in range(W):
        X=[]
        for i in range(H):
            X.append(A[i][j])

        X.sort(reverse=True)

        if X[0]+X[1]>0:
            flag=1

    LL=[[] for i in range((H+W)*2)]
    LL2=[[] for i in range((H+W)*2)]

    for i in range(H):
        for j in range(W):
            LL[i+j].append(A[i][j])
            LL2[i-j+W].append(A[i][j])

    for X in LL+LL2:
        if len(X)>=2:
            XX=sorted(X,reverse=True)

            if XX[0]+XX[1]>0:
                flag=1

    if flag:
        print("infinite")
    else:
        print("finite")