T = int(input())
for t in range(T):
    N, X = map(int, input().split())
    minimum = N * (N + 1) // 2
    if (minimum > X):
        print(-1)
    else:
        diff = X - minimum
        surplus = diff // N
        plus1until = diff % N
        ans = []
        for j in range(N):
            ans.append(N-j + surplus + (1 if j < plus1until else 0))
        print(*ans)