T = int(input())
for _ in range(T):
    N,X = list(map(int,input().split()))
    if(N*(N+1)//2 > X):
        print(-1)
        continue
    
    ans = list(range(1,N+1))
    SUM = N*(N+1)//2
    ans = [i+(X-SUM)//N for i in ans]
    rem = (X-SUM) % N
    if(rem > 0):ans[-rem:] = [i+1 for i in ans[-rem:]]
    print(*ans[::-1])