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;

public class C {
	
	static int sol(String[] a) {
		int sz = 26;
		int[][] dp = new int[sz][sz];
		int max = 0;
		dp[a[0].charAt(0) - 'a'][a[0].charAt(a[0].length() - 1) - 'a'] = a[0].length();
		
		for(int i = 1; i < a.length; i++) {
			int st = a[i].charAt(0) - 'a', e = a[i].charAt(a[i].length() - 1) - 'a'; 
			for(int s = 0; s < sz; s++) {
				if(dp[s][st] > 0) {
					dp[s][e] = Math.max(dp[s][e], dp[s][st] + a[i].length());
				}
//				System.out.println((char)(s + 'a') + " " + (char)(e + 'a') + " " + dp[s][e]);
			}
			dp[st][e] = Math.max(dp[st][e], a[i].length());
		}
		for(int i = 0; i < 26; i++) {
//			System.out.println((char)(i + 'a') + " " + dp[i][i]);
			max = Math.max(max, dp[i][i]);
		}
		return max;
	}
	
	public static void main(String[] args) throws NumberFormatException, IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());
		String[] a = new String[n];
		for(int i = 0; i < n; i++) {
			a[i] = br.readLine();
		}
		System.out.println(sol(a));
	}

}