#include "bits/stdc++.h"
using namespace std;
#define ll long long int
#define rep(i,n) for( int i = 0; i < n; i++ )
#define rrep(i,n) for( int i = n; i >= 0; i-- )
#define REP(i,s,t) for( int i = s; i <= t; i++ )
#define RREP(i,s,t) for( int i = s; i >= t; i-- )
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define INF 2000000000
#define mod 1000000007
#define INF2 1000000000000000000

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(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
	string S; cin >> S;
	int ans = -INF;
	rep(i, S.length()) {
		if (isdigit(S[0]) && isdigit(S[S.length() - 1])){
			ans = max(ans, calc(S));
		}
		S = S.substr(1) + S.front();
	}
	cout << ans << endl;


    return 0;
}