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

#define REP(i,s,e) for (int i = s; i < e; i++)
#define rep(i,n) REP(i,0,n)

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

int main() {
    string s;
    cin >> s;
    int mx = -1e9;
    rep(i,s.size()) {
        if (isdigit(s.front()) && isdigit(s.back()))
            mx = max(mx,calc(s));
        s = s.substr(1) + s.front();
    }
    cout << mx << endl;
    return 0;
}