class Input_kyopro:
    def II(self): return int(input())
    def MI(self): return map(int,input().split())
    def MS(self): return map(str,input().split())
    def LMI(self): return list(self.MI())
    def LMS(self): return list(self.MS())
    def LLI(self,N): return [self.LMI() for _ in range(N)]
    def LLS(self,N): return [self.LMS() for _ in range(N)]
    def LS(self,N): return [input() for _ in range(N)]
    def LSL(self,N): return [list(input()) for _ in range(N)]
    def LI(self,N): return [self.II() for _ in range(N)]
I=Input_kyopro()
#入力
T=I.II()
for _ in range(T):
    N,X=I.MI()
    A=[0]*N
    tmp=0
    for i in range(N):
        ok=0
        ng=10**18+1
        while abs(ok-ng)>1:
            mid=(ok+ng)//2
            if tmp+(N-i)*(mid+mid+N-i-1)//2<=X:
                ok=mid
            else:
                ng=mid
        A[i]=ok
        tmp+=A[i]
    if A[0]==0:
        print(-1)
    else:
        print(*A[::-1])