#include<iostream>
#include<stack>
using namespace std;
stack<int>s;
int main(){
    int n;
    while(scanf("%d",&n)!=EOF){
        if(n==0) printf("0");
        
        while(n!=0){
            s.push(n%8);
            n=n/8;
        }
        while(!s.empty()){
            printf("%d",s.top());
            s.pop();
        }
           printf("\n");
    }
    
    return 0;
}