def solve(N,X):
    ans = [i for i in range(1,N+1)]
    sa = sum(ans)
    if sa > X:
        print(-1)
    else:
        ans.reverse()
        add = X - sa
        d,m = add//N, add%N
        ans = [a+d for a in ans]
        for i in range(m):
            ans[i] += 1
        print(*ans)

T = int(input())
for _ in range(T):
    N,X = map(int,input().split())
    solve(N,X)