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