for _ in range(int(input())):
    n,x=map(int, input().split())
    if (n*(n+1))//2>x:
        print(-1)
        continue
    L=[i for i in range(1,n+1)]
    diff = x-(n*(n+1))//2
    if diff==0:
        print(*L[::-1])
        continue

    for i in range(1,n+1):
        num=n-i+1
        L[-i]+=(diff+num-1)//num
        diff-=(diff+num-1)//num
        if diff==0:
            break
    print(*L[::-1])