from collections import *
from itertools import *
from functools import *
from heapq import *
import sys,math
input = sys.stdin.readline

def answer():
    N,X = map(int,input().split())
    if N*(N+1)//2 >X:
        print(-1)
        return
    
    res = X - N*(N+1)//2
    base,p = divmod(res,N)
    ans = [base + N-i for i in range(N)]
    for j in range(p):
        ans[j] += 1
    print(*ans)
for _ in range(int(input())):
    answer()