T=int(input())
for _ in range(T):
  N=int(input())
  R=list(map(int,input().split()))
  C=list(map(int,input().split()))
  
  if N==1:
    print(1)
    continue
  if N==2:
    print(-1)
    continue
  
  ans=[]
  for i in range(N):
    chk=[R[i]]*N
    ans.append(chk)
  #ここまで横の条件を求めるグリッドの仮作成
    
  if len(set(C))==1:
    #Cの数字が全部同じ時を考える
    if N<=4:
      print(-1)
      continue
    watacco=[]
    for i in range(N):
      if R[i]!=C[0]:
        watacco.append(i)
    for j in range(N):
      i=watacco[j%(N-1)]
      ans[i][j]=C[j]
  else:
    popocco=[k for k in range(N)]
    for l in range(N-1):
      if R[popocco[l]]==C[l]:
        popocco[l],popocco[l+1]=popocco[l+1],popocco[l]
        
    if R[popocco[N-1]]==C[N-1]:
      #最後の列で同じになっちゃうとき
      for m in range(N-1):
        if C[m]!=C[N-1]:
          popocco[m],popocco[N-1]=popocco[N-1],popocco[m]
          break
    for y in range(N):
      x=popocco[y]
      ans[x][y]=C[y]
  for i in range(N):
    print(*ans[i])