#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ii pair <int, int>
#define app push_back
#define all(a) a.begin(), a.end()
#define bp __builtin_popcountll
#define ll long long
#define mp make_pair
#define f first
#define s second
#define Time (double)clock()/CLOCKS_PER_SEC
#define debug(x) std::cout << #x << ": " << x << '\n';
signed main() {
    #ifdef HOME
    freopen("input.txt", "r", stdin);
    #else
    #define endl '\n'
    ios_base::sync_with_stdio(0); cin.tie(0);
    #endif

    int n = 5;
    vector <int> a(n);
    for (int i = 0; i < 5; ++i)
        cin >> a[i];


    vector <int> p;
    for (int i = 0; i < n; ++i) {
        p.app(i);
    }   

    const int INF = 1e18;

    int ans = 0;
    do {

        int nn = 0;

        vector <int> b = a;

        for (int s : p) {
            int mn = INF;
            for (int i = 0; i < 3; ++i) {
                int pos = (s + i) % n;
                mn = min(mn, b[pos]);
            }   
            for (int i = 0; i < 3; ++i) {
                int pos = (s + i) % n;
                b[pos] -= mn;
            }   
            nn += mn;            
        }
        ans = max(ans, nn);

    } while (next_permutation(all(p)));
    cout << ans << endl;
}