T = int(input())
N,X = [],[]
for i in range(T):
  a,b = map(int, input().split(' '))
  N.append(a)
  X.append(b)

for i in range(T):
  lst = []
  for j in range(1, N[i]):
    if X < j:
      lst = [-1]
      break
    
    lst.append(j)
    X[i] -= j
  
  if X[i] <= j:
    lst = [-1]
  else:
    lst.append(X)
  
  print(' '.join([str(j) for j in lst]))