t = int(input())
for _ in range(t):
	n = int(input())
	r = list(map(int, input().split()))
	c = list(map(int, input().split()))
	if n == 2:
		print(-1)
		continue
	if c.count(c[0]) == n:
		print(-1)
		continue
	ind = [-1]*(n+1)
	lis = []
	for i in range(n):
		if ind[c[i]] == -1:
			ind[c[i]] = i
		else:
			lis.append(i)
	ans = [[0]*n for _ in range(n)]
	for i in range(n):
		for j in range(n):
			ans[i][j] = c[j]
	for i in range(n):
		if ind[r[i]] != -1:
			dif = ind[r[i]]
		else:
			dif = lis.pop()
		for j in range((n+1)//2):
			ans[i][(dif+j)%n] = r[i]
	for i in ans:
		print(*i)