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.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;

public class Main{
    public static void main(String[] args) throws NumberFormatException, IOException {
        BufferedReader r = new BufferedReader(new InputStreamReader(System.in));
        
        int N = Integer.parseInt(r.readLine());
        
        char[][] a = new char[N][];
        for(int i = 0; i < N; i++)
            a[i] = r.readLine().toCharArray();
        
        int[][] c = new int[30][30];
        for(int[] i : c)
            Arrays.fill(i, - 1 << 28);
        
        for(int i = 0; i < N; i++){
//          for(char n = 'a'; n <= 'z'; n++)
            for(char p = 'a'; p <= 'z'; p++){
                if(c[p - 'a'][a[i][0] - 'a'] >= 0) c[p - 'a'][a[i][a[i].length - 1] - 'a'] = Math.max(c[p - 'a'][a[i][a[i].length - 1] - 'a'], c[p - 'a'][a[i][0] - 'a'] + a[i].length);
            }
            c[a[i][0] - 'a'][a[i][a[i].length - 1] - 'a'] = Math.max(a[i].length, c[a[i][0] - 'a'][a[i][a[i].length - 1] - 'a']);
        }
        
        int max = 0;
        for(int p = 0; p < 26; p++)
            max = Math.max(c[p][p], max);
        
        System.out.println(max);
    }
}