CF472A.Design Tutorial: Learn from Math

One way to create a task is to learn from math. You can generate some random math statement or modify some theorems to get something new and build a new task from that.

For example, there is a statement called the "Goldbach's conjecture". It says: "each even number no less than four can be expressed as the sum of two primes". Let's modify it. How about a statement like that: "each integer no less than 12 can be expressed as the sum of two composite numbers." Not like the Goldbach's conjecture, I can prove this theorem.

You are given an integer n no less than 12, express it as a sum of two composite numbers.

构造任务的一种方法是向数学学习。你可以生成一些随机的数学命题，或对某些定理进行修改以得到新结论，并基于此构建一道新题目。

例如，有一个著名的命题叫做“哥德巴赫猜想”，其内容为：“任一大于等于 4 的偶数均可表示为两个素数之和”。我们来对它稍作修改：考虑如下命题——“任一大于等于 12 的整数均可表示为两个合数之和”。与哥德巴赫猜想不同，这个命题我可以证明。

现给你一个不小于 12 的整数 $ n $，请将它表示为两个合数之和。

The only line contains an integer n (12 ≤ n ≤ 106).

唯一一行包含一个整数 $n$（$12 \leq n \leq 10^6$）。

Output two composite integers x and y (1 < x, y < n) such that x + y = n. If there are multiple solutions, you can output any of them.

输出两个合数 $x$ 和 $y$（满足 $1 < x, y < n$），使得 $x + y = n$。若存在多组解，输出任意一组即可。

In the first example, 12 = 4 + 8 and both 4, 8 are composite numbers. You can output "6 6" or "8 4" as well.

In the second example, 15 = 6 + 9. Note that you can't output "1 14" because 1 is not a composite number.

在第一个例子中，$12 = 4 + 8$，且 $4$ 和 $8$ 均为合数。你也可以输出 “6 6” 或 “8 4”。

在第二个例子中，$15 = 6 + 9$。注意，你不能输出 “1 14”，因为 $1$ 不是合数。