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 and n <= 4:
		if n == 1:
			print(1)
		else:
			print(-1)
		continue
	ans = [[r[i]]*n for i in range(n)]
	if c.count(c[0]) == n:
		now = 0
		for i in range(n):
			if r[i] == c[0]:
				for j in range(n):
					ans[j][i] = c[0]
			else:
				ans[i][i] = c[0]
	else:
		an = []
		lis = list(range(n))
		for i in range(n-1):
			c1 = lis.pop()
			if r[c1] == c[i]:
				c2 = lis.pop()
				an.append(c2)
				ans[c2][i] = c[i]
				lis.append(c1)
			else:
				an.append(c1)
				ans[c1][i] = c[i]
		if lis[-1] != c[-1]:
			ans[lis[-1]][-1] = c[-1]
		else:
			for i in range(n-1):
				if c[-1] != c[i]:
					bef = an[i]
					ans[bef][-1] = c[-1]
					ans[lis[-1]][i] = c[i]
				

	for i in ans:
		print(*i)