T = int(input())
query = []
for i in range(T):
    n,x = map(int,input().split())
    query.append([n,x])

def kinou(N,X,ans):
    if N == 0:
        return 0
    saisyo = N*(N+1)//2
    hamidasi = X - saisyo
    mod = (hamidasi+N-1)//N
#    print(saisyo,hamidasi,mod)
    ans.append(N+mod)
    kinou(N-1,(X-N-mod),ans)
    



for q in query:
    N = q[0]
    X = q[1]
    ans = []
    if N*(N+1)//2 > X:
        print(-1)
        continue
    kinou(N,X,ans)
    print(*ans)