#include<iostream>
using namespace std;
int main()
{
	int n;
	int k = 0;
	int m = 0;
	int h = 0;
	int arr[10000] = { 0 };
	cin >> n;
	for (int i = 2; h <= n;i++)
	{
		for (int j = i; j > 0; j--)
		{
			if (i % j == 0)
			{
				k++;
				cout << k << " ";
			}
		}
		if (k == 2)
		{
			arr[m] = i;
			m++;
			h += i;
			k = 0;
		}
	}
	for (int i = 0; i < m; i++)
	{
		cout << arr[i]<<"\n";
	}
	return 0;
}