#include <iostream>
#include <algorithm>
using namespace std;

int calc(string s){
   if(s.empty()) return 0;
   size_t p;
   int x = stoi(s,&p);
   return x + calc(s.substr(p));
}

int main(){
   int ans = -1e9;
   string s;
   cin >> s;
   for(int i = 0;i < s.size();i++){
      if(isdigit(s[0]) && isdigit(s[s.size() - 1])) ans = max(ans,calc(s));
      s = s.substr(1) + s.front();
   }
   cout << ans << endl;
}