//分析：int够了
#include <iostream>
#include <vector>
using namespace std;

int main(){
	int n,num;
	vector<int> oct;
	while(cin>>n){
		//oct没清空，影响下轮输出
		oct.clear();
		while(n!=0){
			num = n%8;
			oct.push_back(num);
			n /= 8;
		}
		for(int i = oct.size()-1; i>=0 ;i--) cout<<oct[i];
		cout<<endl;
	}

	return 0;
}