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