T = int(input())
for _ in range(T):
    N, X = map(int, input().split())
    ans = []
    k = X - N*(N+1)//2
    if k < 0:
        print(-1)
        continue
    for i in reversed(range(1, N+1)):
        t = (k-1) // i + 1
        k -= t
        ans.append(i+t)
    print(*ans)