#include<iostream>
#include<stack>
using namespace std;

int main(){
  int no, i;
  stack<int> sum;
  while(cin >> no, no) {
      for( i = 1;no > 8; i*=10){
	sum.push(no % 8);
	no /= 8;

      }
      sum.push(no);
      while(sum.size()) {
	no = sum.top();
	if(no == 4) no++;
	else if(no  >= 5) no+=2;
	cout << no;
	sum.pop();
      }
      cout << endl;
  }
  return 0;
}