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

var input = readline().split(' ').map(Number), n = input[0];
var men = [];
while (n--) {
    men.push(readline());
}

var d = [];
for (var i = 0; i < 27; i++) {
    d[i] = [];
    for (var j = 0; j < 27; j++) d[i][j] = 0;
}

var codeA = 'a'.charCodeAt(); 
for (var i = 0; i < men.length; i++) {
    var a = men[i];
    var first = a[0].charCodeAt() - codeA;
    var last = a[a.length - 1].charCodeAt() - codeA;
    for (var j = 0; j < 27; j++) {
		if (d[j][first] > 0 || j == first)
			d[j][last] = Math.max(d[j][last], d[j][first] + a.length);
    }

}


var res = 0;
for (var i = 0; i < 27; i++) {
    res = Math.max(res, d[i][i]);
}

write(res);
