import sys
input = sys.stdin.readline

def Gauss(n):
    return n * (n + 1)//2

T = int(input())
for _ in range(T):
    N, X = map(int, input().split())
    if X < Gauss(N):
        print(-1)
        continue
    ans = list(range(1, N + 1))
    ans.reverse()
    X -= Gauss(N)
    for i in range(N):
        ans[i] += X // N
    for i in range(X % N):
        ans[i] += 1

    print(*ans)