10
abdcced
bdacdac
ecb
dc
eaeeebdd
adcdbadcac
eb
aadecccde
edbaeacad
accd
 100
d
a
e
eb
c
d
d
e
c
e
ac
d
c
aa
a
e
da
e
e
c
e
a
c
c
bc
bd
d
da
cc
be
b
a
ee
d
be
be
e
b
a
ed
cb
ab
a
ea
ac
aa
ed
d
b
eb
e
ed
c
ce
c
d
c
d
d
ee
e
b
ea
ea
da
ab
ba
ed
da
ec
ea
bd
ee
dc
d
bd
d
c
cc
ab
bd
a
ad
e
d
e
bc
bb
c
bc
a
a
e
ca
ac
c
ad
c
be
d
 3
ab
acb
ba
 10
a
b
a
c
b
a
b
a
a
a
 5
cab
bbc
caa
ccc
aca
 3
ac
abc
ca
 5
ab
bc
cd
de
ffffffffff
 16
ddgcb
fgbhgbdg
gha
dh
ddfb
fggbc
edb
hd
d
hfgcabf
hdaef
fhbcdgba
chee
cafeggc
f
ecb
 50
agecd
cghafi
fiide
iecc
jbdcfjhgd
diee
hfeg
ehc
gfijgjh
gacaifebg
dicbbddc
hjgciaei
jjcdh
g
gc
cf
hfdjhd
c
icidbec
ji
eeh
cgeejggc
acfd
jjg
ajefdj
eghhebiic
bih
gbb
jjaa
idc
gafi
ecg
dbigbjiehj
cedif
ahidfaaajg
hfhhiccbgb
dgegjgieif
hgjebhfdc
j
ahehd
ahdah
bijbhh
a
dabiggfhac
dedigbjbf
ihbdj
iihagchd
gfebhfdi
jbjdcggdh
f

0
 35
 5
 6
 9
 5
 10
 7
 37

import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.StreamTokenizer;
import java.util.Arrays;
import java.util.Scanner;

public class A implements Runnable {

	public void solve() throws IOException {
        int n = nextInt();
        int[][] r = new int[26][26];
        for ( int i = 0; i < 26; i ++ ) {
            Arrays.fill( r[i], Integer.MIN_VALUE / 2 );
        }
        for ( int i = 0; i < n; i ++ ) {
            char[] c = next().toCharArray();
            int f = c[0] - 'a';
            int l = c[c.length - 1] - 'a';
            for ( int j = 0; j < 26; j ++ ) {
//                if ( j == l && j == 'm' - 'a' ) {
//                    out.println( r[j][l] + " " + f + " " + r[j][f] + " " + c.length );
//                }
                r[j][l] = Math.max( r[j][l], r[j][f] + c.length );
            }
            r[f][l] = Math.max( r[f][l], c.length );
//            out.println( f + " " + l + " " + r[f][l] );
        }
        int res = 0;
        for ( int i = 0; i < 26; i ++ ) {
//            if ( r[i][i] > res ) {
//                out.println( r[i][i] + " " + ( ( char ) ( i + 'a' ) ) );
//            }
            res = Math.max( res, r[i][i] );
        }
        out.println( res );
	}

	public StreamTokenizer in;

	public PrintWriter out;

	A() throws IOException {
		in = new StreamTokenizer( new InputStreamReader( System.in ) );
		out = new PrintWriter( System.out );
	}

    int nextInt() throws IOException {
        in.nextToken();
        return ( int ) in.nval;
    }

    String next() throws IOException {
        in.nextToken();
        return in.sval;
    }

    void check( boolean f, String msg ) {
        if ( ! f ) {
            out.close();
            throw new RuntimeException( msg );
        }
    }

    void close() throws IOException {
		out.close();
	}

	public void run() {
		try {
			solve();
			close();
		} catch ( Exception e ) {
            e.printStackTrace( out );
            out.flush();
            throw new RuntimeException( e );
		}
	}

	public static void main( String[] args ) throws IOException {
		new Thread( new A() ).start();
	}
}
