10
abdcced
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edbaeacad
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 100
d
a
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c
d
d
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d
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aa
a
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da
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c
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c
bc
bd
d
da
cc
be
b
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d
be
be
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b
a
ed
cb
ab
a
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ac
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ed
d
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ed
c
ce
c
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c
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d
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ab
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ed
da
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ab
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bb
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ca
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d
 3
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 10
a
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a
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 5
cab
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aca
 3
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 5
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 16
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 50
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0
 35
 5
 6
 9
 5
 10
 7
 37

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException; 
import java.io.InputStreamReader; 
import java.util.Scanner; 
import java.util.StringTokenizer; 
import java.util.*;
import java.io.*;
public class codeforces 
{ 
   static class Student{
       int x,y;
        Student(int x,int y){
            this.x=x;
            this.y=y;
        }
    }
    static int prime[];
    static void sieveOfEratosthenes(int n) 
    { 
        // Create a boolean array "prime[0..n]" and initialize 
        // all entries it as true. A value in prime[i] will 
        // finally be false if i is Not a prime, else true. 
        int pos=0;
        prime= new int[n+1]; 
        for(int p = 2; p*p <=n; p++) 
        { 
            // If prime[p] is not changed, then it is a prime 
            if(prime[p] == 0)
            { 
                // Update all multiples of p
                prime[p]=p;
                for(int i = p*p; i <= n; i += p) 
                    prime[i] = p; 
            } 
        } 
    }
static    class Sortbyroll implements Comparator<Student> 
{ 
    // Used for sorting in ascending order of 
    // roll number 
    public int compare(Student c, Student b) 
    { 
        if(c.x<=b.x)
            return -1;
        return 1;
    } 
} 
static class FastReader 
    { 
        BufferedReader br; 
        StringTokenizer st; 
  
        public FastReader() 
        { 
            br = new BufferedReader(new
                     InputStreamReader(System.in)); 
        } 
  
        String next() 
        { 
            while (st == null || !st.hasMoreElements()) 
            { 
                try
                { 
                    st = new StringTokenizer(br.readLine()); 
                } 
                catch (IOException  e) 
                { 
                    e.printStackTrace(); 
                } 
            } 
            return st.nextToken(); 
        } 
  
        int nextInt() 
        { 
            return Integer.parseInt(next()); 
        } 
  
        long nextLong() 
        { 
            return Long.parseLong(next()); 
        } 
  
        double nextDouble() 
        { 
            return Double.parseDouble(next()); 
        } 
  
        String nextLine() 
        { 
            String str = ""; 
            try
            { 
                str = br.readLine(); 
            } 
            catch (IOException e) 
            { 
                e.printStackTrace(); 
            } 
            return str; 
        } 
    } 
 
    static class Edge{
        int a,b;
        Edge(int a,int b){
            this.a=a;
            this.b=b;
        }
    }
    static class Trie{
        Trie z,o;
        int c;
        Trie(){
            z=null;
            o=null;
            c=0;
        }
    }
    //static long ans;
    static int parent[];
    static int rank[];
    static int b[][];
    static int bo[];
    static int ho[];
    static int seg[];
    //static int pos;
    static Stack<Integer>st;
    static ArrayList<Character>ans;
    static ArrayList<ArrayList<Integer>>adj;
   // static int ans;
    static Trie root;
    static void solve()throws IOException{
        FastReader sc=new FastReader();
        int n,i,j,k,ans=0;
        n=sc.nextInt();
        String s[]=new String[n];
        for(i=0;i<n;i++)
            s[i]=sc.nextLine();
        int dp[][]=new int[26][26];
        int x,y;
        for(i=0;i<n;i++){
            x=(int)s[i].charAt(0)-97;
            y=(int)s[i].charAt(s[i].length()-1)-97;
            for(j=0;j<26;j++){
                if(dp[j][x]!=0||x==j)
                    dp[j][y]=Math.max(dp[j][y],dp[j][x]+s[i].length());
            }
        }
        for(i=0;i<26;i++)
            ans=Math.max(ans,dp[i][i]);
        System.out.println(ans);
    }
    static int tr(int p){
        int y=0,i;
        for(i=0;i<adj.get(p).size();i++)
            y+=tr(adj.get(p).get(i));
        if(y==0)
            y=1;
        bo[y]+=1;
        return y;
    }
    static void update(int l,int r,int s,int e,int in,int val,int le){
        if(s>e||s>r||e<l)
            return;
        if(s==e){
            seg[in]=val;
            return;
        }
        update(l,r,s,(s+e)/2,2*in+1,val,le-1);
        update(l,r,(s+e)/2+1,e,2*in+2,val,le-1);
        if(le%2!=0)
            seg[in]=seg[2*in+1]|seg[2*in+2];
        else
            seg[in]=seg[2*in+1]^seg[2*in+2];
    }
    public static void main(String[] args){
        //long sum=0;
        try {
                codeforces.solve();
                } catch (Exception e) {
                    e.printStackTrace();
                }
    }
 /*static long power(long x, long y, long p) 
{ 
    long res = 1;      // Initialize result 
  
    x = x % p;  // Update x if it is more than or  
                // equal to p 
  
    /*while (y > 0) 
    { 
        // If y is odd, multiply x with result 
        if ((y & (long)1)%2!=0) 
            res = (res*x) % p; 
  
        // y must be even now 
        y = y>>1; // y = y/2 
        x = (x*x) % p;   
    } */
    //return res%p; 
   static int find(int x) 
    { 
        // Finds the representative of the set 
        // that x is an element of 
        while(parent[x]!=x) 
        { 
            // if x is not the parent of itself 
            // Then x is not the representative of 
            // his set,
            x=parent[x];
  
            // so we recursively call Find on its parent 
            // and move i's node directly under the 
            // representative of this set 
        } 
  
        return x; 
    }
    static void union(int x, int y) 
    { 
        // Find representatives of two sets 
        int xRoot = find(x), yRoot = find(y); 
  
        // Elements are in the same set, no need 
        // to unite anything. 
        if (xRoot == yRoot) 
            return; 
  
         // If x's rank is less than y's rank 
        if (rank[xRoot] < rank[yRoot]) 
  
            // Then move x under y  so that depth 
            // of tree remains less 
            parent[xRoot] = yRoot; 
  
        // Else if y's rank is less than x's rank 
        else if (rank[yRoot] < rank[xRoot]) 
  
            // Then move y under x so that depth of 
            // tree remains less 
            parent[yRoot] = xRoot; 
  
        else // if ranks are the same 
        { 
            // Then move y under x (doesn't matter 
            // which one goes where) 
            parent[yRoot] = xRoot; 
  
            // And increment the the result tree's 
            // rank by 1 
            rank[xRoot] = rank[xRoot] + 1; 
        } 
    } 
    static long gcd(long a, long b) 
    { 
        if (a == 0) 
            return b; 
        return gcd(b % a, a); 
    }
}