## https://yukicoder.me/problems/no/2255

def main():
    N, K = map(int, input().split())

    n_max = ((N - 1) * N) // 2
    n_min = N - 1

    if not (n_min <= K <= n_max):
        print(-1)
        return
    
    p_array1 = [i for i in range(1, N + 1)]
    p_array2 = [i for i in reversed(range(1, N + 1))]
    p_array = []
    for i in range(N):
        if i % 2 == 0:
            p_array.append(p_array1[i // 2])
        else:
            p_array.append(p_array2[i // 2])
    
    ans_array = [p_array[0]]
    used = [False] * (N + 1)
    used[p_array[0]] = True
    for i in range(1, N):
        n = abs(p_array[i] - p_array[i - 1])
        if n <= K:
            ans_array.append(p_array[i])
            used[p_array[i]] = True
            K -= n
        else:
            if (i - 1) % 2 == 1:
                ans_array.append(p_array[i - 1] - K)
                used[p_array[i - 1] - K] = True
            else:
                ans_array.append(p_array[i - 1] + K)
                used[p_array[i - 1] + K] = True
            K = 0
        if K == 0:
            break
    
    ans_array2 = [ans_array[0]]
    for i in range(1, N + 1):
        if not used[i]:
            ans_array2.append(i)
    for i in range(1, len(ans_array)):
        ans_array2.append(ans_array[i])
    
    print(" ".join(map(str, ans_array2)))

    


            



if __name__ == "__main__":
    main()