S = [0]*200000
S[0] = 1
for i in range(200000):
    if i == 0:
        S[i] = 1
        continue
    S[i] = S[i-1] + i+1

T = int(input())
for _ in range(T):
    N,X = map(int, input().split())
    if X < S[N-1]:
        print(-1)
        continue
    if N == 1:
        print(X)
        continue

    ans = []
    for i in range(1,N):
        ans.append(i)
    ans.append(X-S[N-2])
    print(*ans)