for _ in range(int(input())):
    N, X = map(int, input().split())
    tmp = X - (N + 1) * N // 2
    if tmp < 0:
        print(-1)
        continue
    a = tmp // N
    b = tmp % N
    ans = []
    x = N
    for i in range(N):
        c = x + a
        if i < b:
            c += 1
        ans.append(c)
        x -= 1
    print(*ans)