#include<iostream>
#include<algorithm>
#include<vector>

using namespace std;

void change(int x) {
	vector<int> q;
	while (x) {
		q.push_back(x % 8);
		x /= 8;
	}
	reverse(q.begin(),q.end());
	for (auto c : q) cout << c;
	cout << endl;
}

int main() {
	int x;
	while (cin >> x) {
	    change(x);
	}

	return 0;
}