#include <iostream>
using namespace std;
int des9(int a, int n)
{
	int i,des=0;
	for (i = 0; i < n; i++)
	{

		des += (a % 10) * pow(3, i);
		a = a / 10;
	}
	return des;
}
int counter(int temp)
{
	int k = 1;
	while (temp >= 17)
	{
		temp /= 17;
		k++;
	}
	return k;
}
int main()
{
	char s17;
	int i,a, n = 1,des=0,temp,k;
	cin >> a;
	temp = a;
	while ((temp /= 10) > 0) n++;
	des = des9(a, n);
	/*for (i = 0; i < n; i++)
	{

		des += (a%10) * pow(3,i);
		a = a / 10;
	}*/
	/*temp = des;
	while (temp >= 17)
	{
		temp /= 17;
		k++;
	}*/
	k = counter(des);
	while (k != 0)
	{
		int h = pow(17, k - 1);
		if (((des / h) % 17) > 9) s17 = des / h % 17 + '7';
		else s17 = des / h % 17 + '0';
		k--;
		cout << s17;
	}
	return 0;
}