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
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g
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c
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ahdah
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a
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dedigbjbf
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iihagchd
gfebhfdi
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f

0
 35
 5
 6
 9
 5
 10
 7
 37

import java.util.*;
import java.io.*;
public class G {

	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine().trim());
		char[][] s = new char[n][2];
		int[] len = new int[n];
		for(int i = 0; i < n; i++){
			char[] t = br.readLine().toCharArray(); 
			s[i][0] = t[0]; s[i][1] = t[t.length-1];
			len[i] = t.length;
		}
		int[][] dp = new int[26][26];
		for(int c = 0; c < 26; c++) {
			Arrays.fill(dp[c], -1);
			dp[c][c] = 0;
		}
		for(int i = 0; i < n; i++){
			int[][] dp2 = dp.clone();
			for(int c = 0; c < 26; c++){
				if(dp[c][s[i][0]-'a'] >= 0){
					dp[c][s[i][1]-'a'] = Integer.max(dp2[c][s[i][1]-'a'], dp[c][s[i][0]-'a'] + len[i]);
				}
			}
			dp = dp2;
		}
		int res = 0;
		for(int c = 0; c < 26; c++){
			res = Integer.max(res, dp[c][c]);
		}
		System.out.println(res);
	}

}
