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
	ans = [[0]*n for _ in range(n)]
	for i in range(n):
		for j in range(n):
			if r[i] == c[j]:
				ans[i][j] = r[i]
				ans[i][(j+1)%n] = r[i]
	for i in range(n):
		for j in range(n):
			if ans[i][j] == 0:
				ans[i][j] = c[j]
	for i in ans:
		print(*i)