def cs(n):
    return n*(n+1)//2


T = int(input())

for _ in range(T):
    N,X = map(int,input().split())
    P = []
    for i in range(N):
        idx = N - i
        s = cs(idx)
        rem = X - s
        if rem < 0:
            break
        q = rem//idx
        r = rem%idx
        p = idx + q
        if r > 0:
            p += 1
        P.append(p)
        X -= p
        
    if len(P) == N:
        print(*P)
    else:
        print(-1)