import sys
input = sys.stdin.readline

T = int(input())
for _ in range(T):
    N, X = map(int, input().split())
    if N == 1:
        print(X)
        continue
    ans = list(range(1, N))
    ans.append(X - sum(ans))
    if ans[-1] <= ans[-2]:
        print(-1)
    else:
        print(*ans)