#include<bits/stdc++.h> using namespace std; int main(){ long long x=1,sum=0; string s,s1; char c; cin>>s; for(int i=s.size()-1;i>=0;i--){ if(s[i]>='0'&&s[i]<='9') sum+=(s[i]-'0')*x; else sum+=(s[i]+10-'A')*x; x=x*16; } while(sum>0){ c=sum%8+'0'; s1=c+s1; sum/=8; } cout<<s1; return 0; }