# n * n * n = sum(连续n个奇数) = n * (首尾相加) / 2
# 中间数 = (首尾相加) / 2 = n * n
# 首数 = n * n - n + 1
# 尾数 = n * n + n - 1

while True:
    try:
        n: int = int(input())
        middle_num: int = n * n
        list1: list = []
        sum: int = 0
        for i in range(middle_num - n + 1, middle_num + n, 2):
            list1.append(i)
            sum += i
        # print(sum)
        # print(n * n * n)
        if sum == n * n * n:
            print("+".join(str(x) for x in list1[::1]))
    except:
        break