T=int(input())
for _ in range(T):
	n,x=map(int,input().split())
	if n*(n+1)//2>x:
		print(-1)
		continue
	ok=10**10
	ng=n-1
	while ok-ng>1:
		m=(ok+ng)//2
		if n*(m+m-n+1)//2>=x:
			ok=m
		else:
			ng=m
	a=list(range(ok-n+1,ok+1))[::-1]
	for i in range(n*(ok+ok-n+1)//2-x):
		a[~i]-=1
	print(*a if 0 not in a else -1)