for _ in range(int(input())):
  h,w=map(int,input().split())
  a=[[*map(int,input().split())]for _ in range(h)]
  ok=0
  n=h+w
  ai=[[]for _ in range(h)]
  aj=[[]for _ in range(w)]
  ij=[[]for _ in range(2*n)]
  ji=[[]for _ in range(2*n)]
  for i in range(h):
    for j in range(w):
      ai[i]+=a[i][j],
      aj[j]+=a[i][j],
      ij[i+j]+=a[i][j],
      ji[i-j]+=a[i][j],
  for aa in(ai,aj,ij,ji):
    for na in aa:
      if len(na)>1:
        na.sort()
        if na[-1]+na[-2]>0:
          ok=1
  if ok:
    print('infinite')
  else:
    print('finite')