T=int(input())

for _ in range(T):
    N,X=list(map(int, input().split()))
    s=(1+N)*N//2
    if s>X:
        print(-1)
        continue
    x=(X-s)//N
    r=X-(s+x*N)
    ans=[]
    for i in range(N,0,-1):
        a=i+x
        if r>0:
            a+=1
            r-=1
        ans.append(a)
    print(*ans)