#include<bits/stdc++.h>
using namespace std;
string s,a;
int c=0,t=1,k=0;
int main(){
    cin>>s;
    for(int i=s.size()-1;i>=0;i--){
        if(s[i]>'9') c=c+(s[i]-55)*t;
        else c=c+(s[i]-48)*t;
        t=t*16;
    }
    if(c==0) cout<<0;
    while(c!=0){
    	a[k++]=(c%8)+48;
    	c=c/8;
    }
    for(int i=k-1;i>=0;i--){
    	cout<<a[i];
    }
    
    return 0;
}
/**************************************************************
	Problem: 1295
	User: hongjiaming
	Language: C++
	Result: Wrong Answer
****************************************************************/