T = int(input())
for _ in range(T):
    N,X = map(int, input().split())
    ANS = []
    i = 1
    while len(ANS)<N and X>=i:
        ANS.append(i)
        X-=i
        i+=1
    ANS[-1]+=X
    if len(ANS)==N:
        print(*ANS)
    else:
        print(-1)