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 os, sys, atexit

if sys.version_info[0] < 3:
    range = xrange
    from cStringIO import StringIO as BytesIO

    sys.stdout = BytesIO()
else:
    from io import BytesIO

    sys.stdout = BytesIO()
    _write = sys.stdout.write
    sys.stdout.write = lambda s: _write(s.encode())
atexit.register(lambda: os.write(1, sys.stdout.getvalue()))

input = BytesIO(os.read(0, os.fstat(0).st_size)).readline
from sys import stdin

str_inp = lambda n: [input().strip() for x in range(n)]

n = int(input())
a, ans = str_inp(n), 0

for j in range(ord('a'), ord('z') + 1):
    mem = [0] * (26)

    for i in range(n):
        c1, c2 = ord(a[i][0]) - ord('a'), ord(a[i][-1]) - ord('a')
        if mem[c1] or a[i][0] == chr(j):
            mem[c2] = max(mem[c1] + len(a[i]), mem[c2])

    ans = max(ans, mem[ord(chr(j)) - ord('a')])

print(ans)
