T = int(input())
for t in range(T):
    N, X = map(int,input().split())
    if X < N*(N+1)//2:
        print(-1)
    else:
        tmp = X - N*(N+1)//2
        a = [0]*N 
        for i in range(N):
            if i < tmp%N:
                a[i] = (N-i) + tmp//N + 1 
            else:
                a[i] = (N-i) + tmp//N
        print(*a)