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

#include <bits/stdc++.h>
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
using namespace std;
void print(vector<vector<long long int>>& dp) {
  for (auto i : dp) {
    for (auto j : i) cout << max(0ll, j) << " ";
    cout << "\n";
  }
  cout << "\n";
}
signed main() {
  long long int n;
  cin >> n;
  vector<string> a(n);
  for (long long int i = 0; i < n; i++) cin >> a[i];
  vector<vector<long long int>> dp(26, vector<long long int>(26, -1e15));
  for (long long int i = 0; i < n; i++) {
    long long int f = a[i].front() - 'a';
    long long int s = a[i].back() - 'a';
    for (long long int j = 0; j < 26; j++)
      dp[j][s] = max(dp[j][s], (long long int)(dp[j][f] + a[i].size()));
    dp[f][s] = max(dp[f][s], (long long int)(a[i].size()));
  }
  long long int ans = 0;
  for (long long int i = 0; i < 26; i++) ans = max(ans, dp[i][i]);
  cout << max(0ll, ans) << "\n";
  return 0;
}
