#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001

int main(){
	
	int N;
	cin>>N;
	
	vector<string> S;
	
	rep(i,N){
		string s;
		cin>>s;
		
		string t = s;
		sort(t.begin(),t.end());
		if(s!=t)continue;
		S.push_back(s);
	}
	
	vector<vector<pair<int,int>>> X(26);
	
	int ans = 0;
	vector<int> cost(26,0);
	rep(i,S.size()){
		if(S[i][0]==S[i].back())cost[S[i][0]-'a'] += S[i].size();
		else{
			X[S[i][0]-'a'].emplace_back(S[i].back()-'a',S[i].size());
		}
	}
	
	vector dp(26,0);
	
	rep(i,26){
		dp[i] += cost[i];
		rep(j,X[i].size()){
			int x = X[i][j].first,y = X[i][j].second;
			dp[x] = max(dp[x],dp[i]+y);
		}
		if(i!=25)dp[i+1] = max(dp[i+1],dp[i]);
	}
	ans += dp.back();
	
	cout<<ans<<endl;
	
	
	return 0;
}