#include <bits/stdc++.h>
using namespace std;

long long thr=(1LL<<32);
int main() {
  string s, s2;  
  cin>>s;
  if(s.at(0)!='x'){
    cout<<s<<endl;
    return 0;
  }
  int cnt=0;
  long long num;
  cnt = count(s.begin(), s.end(), 'x');
  //cout<<cnt<<endl;
  s2=s.substr(cnt);
  num=stoll(s2);
  cout<<thr-num<<endl;
  return 0;
}