t = int(input())
N = []
X = []
for _ in range(t):
    n, x = map(int, input().split())
    N.append(n)
    X.append(x)
for j in range(t):
    n = N[j]
    x = X[j]
    if n == 1:
        print(x)
        exit()
    ans = []
    for i in range(1, n):
        ans.append(i)
    sum_ans = sum(ans)
    if x-sum_ans <= ans[-1]:
        print(-1)
    else:
        print(*ans, x-sum_ans)