import sys
input = lambda: sys.stdin.readline()[:-1]
sys.setrecursionlimit(1000000)

t = int(input())

for i in range(t):
    n, x = map(int, input().split())
    p = x - (n+1)*n//2
    if p < 0:
        print(-1)
    else:
        taseru = p//n
        amari = 1+p%n
        #print(p, taseru, amari)
        print(*[i+taseru for i in range(2, n+1)][::-1], amari+taseru)