import itertools

def sub(l,n):
    return (l + l - (n - 1))*n/2

t = int(input())

for case in range(t):
    n,x = map(int,input().split())
    if x < n*(n+1)/2:
        print(-1)
    else:
        ans = [10**18]
        for i in range(n-1):
            left = 0
            right = ans[-1]-1
            while left + 1 < right:
                mid = (left + right)//2
                if sub(mid - 1, n - 1 - i) < x - mid:
                    left = mid
                else:
                    right = mid
            x -= right
            ans.append(right)
        
        ans.append(x)
        print(*ans[1:])