#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define all(x) x.begin(),x.end()
#define rep(i,a,b) for(int i=a;i<=b;i++)
#define each(a,x) for (auto& x: a)
const char nl = '\n';
bool good(string s){
    string t = s;
    sort(all(s));
    return s == t;
}
void solve(){
    int n; cin >> n;
    vector<vector<int>> a;
    while (n--){
        string s; cin >> s;
        if (good(s)){
            a.push_back({s[0] - 'a', s.back() - 'a', (int) s.size()});
        }
    }
    vector<int> dp(26);
    sort(all(a));
    each(a,v){
        int st = v[0], ed = v[1], len = v[2];
        dp[ed] = max(dp[ed], dp[st] + len);
        rep(i,0,24) dp[i+1] = max(dp[i+1], dp[i]);
    }
    cout << dp.back() << nl;

}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int t = 1;// cin >> t;
    while (t--){
        solve();
    }
}