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

long long thr=pow(2, 32);
int main() {
  string s, s2;  
  cin>>s;
  if(s.at(0)!='x'){
    cout<<s<<endl;
    return 0;
  }
  int i=0;
  long long num;
  while(s.at(i)=='x'){
    i++;
  }
  s2=s.substr(i);
  //cout<<s2<<endl;
  num=stoll(s2);
  cout<<thr-num<<endl;
  return 0;
}