#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC target("sse4")
const char nl = '\n';
using namespace std;
using ll = long long;
using vi = vector<int>;
using vl = vector<ll>;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using str = string;
str to_string(char c) { return str(1, c); }
str to_string(bool b) { return b ? "true" : "false"; }
str to_string(const char* second) { return (str)second; }
str to_string(str second) { return second; }
template <class A>
str to_string(complex<A> c) {
  stringstream ss;
  ss << c;
  return ss.str();
}
str to_string(vector<bool> v) {
  str res = "{";
  for (int i = 0; i < (int)v.size(); i++) res += char('0' + v[i]);
  res += "}";
  return res;
}
template <size_t SZ>
str to_string(bitset<SZ> b) {
  str res = "";
  for (int i = 0; i < b.size(); i++) res += char('0' + b[i]);
  return res;
}
template <class A, class B>
str to_string(pair<A, B> p);
template <class T>
str to_string(T v) {
  bool fst = 1;
  str res = "{";
  for (const auto& x : v) {
    if (!fst) res += ", ";
    fst = 0;
    res += to_string(x);
  }
  res += "}";
  return res;
}
template <class A, class B>
str to_string(pair<A, B> p) {
  return "(" + to_string(p.first) + ", " + to_string(p.second) + ")";
}
void DBG() { cerr << "]" << endl; }
template <class H, class... T>
void DBG(H h, T... t) {
  cerr << to_string(h);
  if (sizeof...(t)) cerr << ", ";
  DBG(t...);
}
string c;
int n;
int dp[26][26];
signed main() {
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);
  cin >> n;
  for (int i = 0; i < 26; i++) {
    for (int j = 0; j < 26; j++) {
      dp[i][j] = -1e9;
    }
  }
  int ans = 0;
  for (int i = 0; i < n; i++) {
    cin >> c;
    int m = c.length();
    int a = c[0] - 'a';
    int b = c[m - 1] - 'a';
    for (int j = 0; j < 26; j++) {
      dp[j][b] = max(dp[j][b], dp[j][a] + m);
    }
    dp[a][b] = max(dp[a][b], m);
  }
  for (int i = 0; i < 26; i++) {
    ans = max(ans, dp[i][i]);
  }
  cout << ans << nl;
}
