for _ in range(int(input())):
	n, x = map(int, input().split())
	if n * (n + 1) // 2 > x:
		print(-1)
	else:
		a = list(range(n, 0, -1))
		x -= sum(a)
		c = x // n
		for i in range(n):
			a[i] += c
		x %= n
		for i in range(x):
			a[i] += 1
		print(*a)