#include <iostream>
using namespace std;
int counter(char* s)
{
	int cc = 0;
	while (s[cc] != '\0')
	{
		cc++;
	}
	return cc;
}
int des9(char* s3,int cc)
{
	int i; int des = 0;
	for (i = 0; i < cc; i++)
	{
		des += (s3[i] - '0') * pow(3, cc - i - 1);
	}
	return des;
}
int main()
{
	char s3[25];
	char s17[25];
	int i, j,des=0,k=1,temp,cc;
	gets_s(s3);
	cc = counter(s3);
	des = des9(s3, cc);
	temp = des;
	while (temp >= 17)
	{
		temp /= 17;
		k++;
	}
	for (j = k-1; j>=0; j--)
	{
		if((des % 17)>9) s17[j] = des % 17 + '7';
		else s17[j] = des % 17+'0';
		des /= 17;
	}
	s17[k] = '\0';
	/*for(j=0;j<k;j++)*/
		cout << s17/*[j]*/;
}