for i in range(int(input())):
  a,b=map(int,input().split())
  ans=[]
  count=0
  for i in range(a-1):
    ans.append(i+1)
    count+=i+1
  count=b-count
  if count<a:
    print(-1)
    continue
  ans.append(count)
  print(*ans)