#include <bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
#define rep(i,n) for (int i = 0; i < (n); i++)
#define REP(i,a,b) for(int i=(a);i<(b);i++)
#define all(v) begin(v),end(v)
#define rall(v) rbegin(v),rend(v)
#define fi first
#define se second
#define re0 return 0
template<typename A, typename B> inline bool chmax(A &a, B b) { if (a<b) { a=b; return 1; } return 0; }
template<typename A, typename B> inline bool chmin(A &a, B b) { if (a>b) { a=b; return 1; } return 0; }
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using tup = tuple<ll, ll, ll>;
using cp = complex<double>;
constexpr ll inf = 2e9;
constexpr ll llinf = 9e18;
//constexpr ll MOD = 998244353;
constexpr ll MOD = 1000000007;
const double pai = acos(-1);

int main() {
    //cout<<fixed<<setprecision(15);
    int n;cin>>n;
    vector<pair<char,string>> vec;
    rep(i,n){
        string s;cin>>s;
        string t=s;
        sort(all(t));
        if(s==t)vec.push_back(make_pair(s[s.size()-1],s));
    }
    int m=vec.size();
    sort(all(vec));
    vector<vector<int>> dp(m+1,vector<int>(26));
    rep(i,m)rep(j,26){
        if(j+1<26)chmax(dp[i][j+1],dp[i][j]);
        if(vec[i].se[0]-'a'==j){
            chmax(dp[i+1][vec[i].se[vec[i].se.size()-1]-'a'],dp[i][vec[i].se[0]-'a']+vec[i].se.size());
        }
        chmax(dp[i+1][j],dp[i][j]);
    }
    cout<<*max_element(all(dp[m]))<<endl;
}