for _ in range(int(input())):
    h, w = map(int, input().split())
    a = [list(map(int, input().split())) for _ in range(h)]
    dh = [[-10 ** 9] * 3 for _ in range(h)]
    dw = [[-10 ** 9] * 3 for _ in range(w)]
    ans = True
    for dx, dy in (1,0), (0,1), (1,1), (1,-1):
        visited = [[False] * w for _ in range(h)]
        for i in range(h):
            for j in range(w):
                if visited[i][j]:
                    continue
                d = [-10 ** 9] * 3
                x, y = i, j
                while 0 <= x < h and 0 <= y < w:
                    d[0] = a[x][y]
                    visited[x][y] = True
                    d.sort()
                    x += dx
                    y += dy
                ans = ans and d[1] + d[2] <= 0
    print('finite' if ans else 'infinite')