#include<bits/stdc++.h> using namespace std; string s,s1; int main(){ long long n,m=0; cin>>s; for(int i=0;i<s.size();i++){ if(s[i]>='A'&&s[i]<='F'){ n=s[i]-'A'+10; }else{ n=s[i]-'0'; } m=m*16+n; } char c; while(m>0){ c=m%8+'0'; s1=c+s1; m=m/8; } cout<<s1; return 0; }