from sys import stdin
input = stdin.readline

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

    flag = False
    for i in range(H):
        for j in range(W):
            if A[i][j] <= 0: continue
            for k in range(H):
                if k == i: continue
                if -A[i][j] < A[k][j]:
                    flag = True
                diff = abs(k-i)
                if 0 <= j-diff and -A[i][j] < A[k][j-diff]:
                    flag = True
                if j+diff < W and -A[i][j] < A[k][j+diff]:
                    flag = True
            for k in range(W):
                if k == j: continue
                if -A[i][j] < A[i][k]:
                    flag = True

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