import sys
input = sys.stdin.readline

for _ in range(int(input())):
    n, x = map(int, input().split())
    min_ = n * (n + 1) // 2
    if x < min_:
        print(-1)
        continue
    d = x - min_
    q, r = divmod(d, n)
    ANS = [n - i for i in range(n)]
    for i in range(n):
        if i < r:
            ANS[i] += q + 1
        else:
            ANS[i] += q
    print(*ANS)