#include <iostream>
#include <cstring>
#include <algorithm>
using namespace std;
int main()
{
int n;
while(cin >> n)
{
string ans = "";
while(n != 0)
{
int x = n % 8;
ans += (x + '0');
n /= 8;
}
reverse(ans.begin(), ans.end());
cout << ans << endl;
}
return 0;
}