t=int(input())
def Q(a,b):
    Ans=[]
    V8=[]
    for i in range(-1,2):
        for j in range(-1,2):
            if (i,j)!=(0,0):
                V8.append((i,j))
    for V in V8:
        for j in range(1,1000):
            I=(a+V[0]*j,b+V[1]*j)
            if I[0]<0 or I[0]>=h or I[1]<0 or I[1]>=w:
                break
            Ans.append(I)
    #print(Ans)
    return Ans
for _ in range(t):
    h,w=map(int,input().split())
    X=[]
    for i in range(h):
        X.append(list(map(int,input().split())))
    fg=False
    for i in range(h):
        for j in range(w):
            for I in Q(i,j):
                if X[i][j]+X[I[0]][I[1]]>0:
                    #print(i,j,I)
                    fg=True
                    break
            if fg:
                break
    if fg:
        print("infinite")
    else:
        print("finite")