5
cbbbb
bcbbb
aacbb
aaacb
aaaac
 20
bifcabiabgfibfccdbgd
cffaheagahcbacafbgeb
jagcacbadagcedbigaja
aaadicdbjdiibhihbgeb
hiijbehdeaafdabiigha
fiifibibgddjfbdafbif
hdbgbcfjdgibadabfgaf
gggdaijhfgbaidfajdaj
fajhebaaaigdjaajcaij
bhcbajicidbjbabdbfcb
bghiidibabbbbgiacbfe
jcdabjdjbhfdiicdehci
hcbaebdbaajheaiefdaa
jheeiabjagjhbadigcjb
igijbhbahbbdibjaabcj
bdbhgjgibcdehabdabia
hjagcbedbgbdfhbiijbh
hacccbaajaibdeiaijbb
dhhebbcajabijaggaegf
cdjgieheagedjgabeecb
 20
babbababaababaaaaaba
bbabbababaababaaabab
babbaababbbbbabbbbbb
babbbbbaabaabaaaaabb
abbbaaaabbaabbaaabbb
babbabbaaabaaabbabbb
aabbbababbabbbbbabba
ababaaabaaabaabaaaaa
aaabbabbaaabababbabb
aaaaabbaaabaaabbabaa
bbbbbabbbbbabbabbbba
bbbbbabbbabbaaaabaaa
abaaaabbaaaabbabbbaa
abaaababbababbbaabaa
abbbbbbaababaabbbbaa
baababbbbaabbabbbaba
bbaaaaabbbabaabaaaba
bbabaaaabbabbabbabab
aababaababbbaaaababa
aaababababbbaabbabaa
 20
babbabayrabbaabaaaha
basaacbuabaaqrvbbdlk
bdbgbadagbllaeizlwbb
opgqbmgkoebytbbjanab
abacabtbbcrscoyabalb
lbbbabyxabatgamganlk
nmabaanslqiabaaaabaq
akbamjpbaaeaqebamlmb
ubvtfjbqbnadsbmaaatc
bbbzhbaamkpaamfazzab
adbbnvkagaaasblbarbe
auabjnqbasajiaadabyv
orbhabhbdbeazzaubjla
xxbaabababrzabsybylb
akabxbbbdabfbjbbpanh
znabpmgpahbhabhajabb
bkbamnaafgbblbhbtafi
ybhayabavbbdsldaabwa
bjaaageayabeafbagalz
xaasaaagkoabzdaaahaq
 20
bdacfdbjjbbajffjffgb
faaehaaaagebeacaigfb
bdcccgeajjbgbbibbgeb
ahcaggjjcbijhdjgfbdf
bcaiiedbbdbcjiaegjba
bihbeaibbbgafhhbghea
edfhahhahjadifhchgff
bfaaaccedgfagabigfgf
igabbbhbfbjiegbibbga
igjaabddajdibbffgihf
agaeafahehbbegcgjacg
gjhbccafiaabciefiibe
acbiegabjbejhafbiaci
aabegcfcebdfjbgadegc
eejfbhbjdgaaaaagbjja
hcbbeabjiafbhgaeebja
ceagababbhaaieifhijg
eeifbbgefbahjijibcbj
jjbjabejaijchhgfdbab
bfafabfdhafcdaedbibj
 20
babbaaabbbbaaaaaaabb
aaabbababbbbaaaaaaba
aabaaaaababaabbaaabb
baabbbaababbaaababab
bbabbbababbbaaaaabba
baaaaabaabbabbbabbbb
aaabbaaaabbaaababaab
aabbbaaaababaabbbaab
babababababaabababba
aabaabbaabbbabaabaab
aaababbbbbbbabaababb
aaababaabbaabbbaabab
aaaabaaabababbbbaaaa
abbababaabbbaaababba
aabaabbabbbbbabbabba
aabbbbbbaababbbbabaa
baabbbababaaabbaabbb
abbaaabaaabaabaabbab
aaaaabbbbbbabaabaaba
ababbabbbababbaaaaab
 20
fjcfedbjfecdfhgghfeh
dhiheiciigiighcgjfhg
gieecdgggiebiaidedce
eahhiiihjdeehigjiegj
hjiijhfefejjfghgghgf
ffjhbgjgfhijddfiehhf
cfhfdjfjjeidgedbcgcj
gfghdddhchcfafiegifi
diejhifcecfccbhhgede
jjbicfdddciiieegdchc
icicccaggjgjihdggjhe
hbbhhegdgdbeedghfjgc
gffecfjcicgiacgggjcf
jiijdhdgjfjfidihhijj
egiecgffjjhcghhggjac
jfjibefhdjfefcibcdfd
efffidccfihhgcegcedg
cidiceheihdejcjbdece
ichghghfibgfegcejfhc
jeffecfiedfhjdhdhcfi
 20
cbjzmuwqxaaxicgefrxj
bbfwlmygvkzirgachxqw
wfejdpzlgeahfiretwpa
cpczshlzdyqudtxmorbk
oyhmrdcwqiquahqytkhm
bbrxtbmcamwuhhvddzfv
opunsvbwbcqtfdfuwxiq
qktojxhchvbbeezqumkx
imuokdeomiwfpxcoagqf
cagmclspynkpjhlqsloo
qbiytqeatysabejounxh
ychdrromhhfupxclcqjd
dnbjwewgtppdnajarrbu
opdaellawuoxmzfrivkz
hwkipzijapqezisqqsvs
dcemuxprvffrmcxbqxea
dwfgdbjjpwqzoxgtipqp
kqwsadrdfjdpiiqqpvla
ztvnyjjeywgtakezbyap
tvnyoowvumqqokrxyspb
 20
beaavatfbsalatbbbslb
nlfqkkaabwaarqvnbtfh
gakzaqbywajdculbaezl
fbbxlbkeadbxamkkbqbd
kbabaaljabarbidunbax
vftpavagkirzqamubbbb
ljrapitcwzblwabyugio
zkkinrabaavbfvpbsuwa
bitkbabhenjhzbzaaoae
wuepabbgvtstaibagrwa
haiwbbrbvrkbuabbhfai
xbgnbxxfcxvwamiiaysr
ybadnbeklocbqajbbbtf
uoajmqbemeaaeqbqdhab
lqdhxvajffuedvgtwzce
hpjixsautdpbagenastn
bapsqpzzakgaitbbybbo
xbwbjgwfibcbbbxqabna
plrbbjbaqkvahhietkbq
burjzprjaqowlqjwnfbr
 20
gjiedffdbjhjiigcjccc
ddehghhcefjicgghegeh
dggefbeibfgifdgihcdj
gjidhhcjhcecgacfgdeg
hegfffiijahgfjhghdci
fceeaigbhhhcgjeigffe
ihjefdgjiiccibcfcfjh
fjfgigjjhaahhjeegjcj
efieggefcbggddjfadea
eehdcidhhhciidefghai
iijjcedcbcdhijicdidj
gcjjjdbefdeigjfcjjdj
gihfgiefceifgjfdhfjg
hhjiigedijcdigdfjhjh
gaeicedaiffefidjcfcd
jejhgdibdfjhhfbgfhch
iehbibicabijjgddiiec
fdegjdffegiecdbgfdid
edjiecdcghfaggadhhhg
ejcfcjhgcaaigdigfcih
 20
odabiabuqicstbbagybh
rxalxmdbdojbqbwbwxaa
agabsbboahmaalimcacb
abzaaragsabsbaatspjf
ryabaaqbfmxhxavbxmba
gzkbibakfzaafbxqbabx
lmabynjvrrjbbamamaxl
fabuaxbaeohwadozbaue
aeazaohaadaaiambbdaj
azaauababtadiuxoamay
ahyamvhgnabubaatajat
apsbaaanbnsakkaabgaz
aabgabbagnnbbnbbggqo
ajbbapshpjqbboraaabb
rsjapeavamnpebnbaxbb
aaubooarecaalgdcjbav
vobvvbfbaeaaaiaajvnw
rbqsktbqzoysazadkbbb
aterbbbgataabbabpbjn
zbbcawdghajaabbvbpba
 20
cbbbbbbbbbbbbbbbbbbb
bcbbbbbbbbbbbbbbbbbb
aacbbbbbbbbbbbbbbbbb
aaacbbbbbbbbbbbbbbbb
aaaacbbbbbbbbbbbbbbb
aaaaacbbbbbbbbbbbbbb
aaaaaacbbbbbbbbbbbbb
aaaaaaacbbbbbbbbbbbb
aaaaaaaacbbbbbbbbbbb
aaaaaaaaacbbbbbbbbbb
aaaaaaaaaacbbbbbbbbb
aaaaaaaaaaacbbbbbbbb
aaaaaaaaaaaacbbbbbbb
aaaaaaaaaaaaacbbbbbb
aaaaaaaaaaaaaacbbbbb
aaaaaaaaaaaaaaacbbbb
aaaaaaaaaaaaaaaacbbb
aaaaaaaaaaaaaaaaacbb
aaaaaaaaaaaaaaaaaacb
aaaaaaaaaaaaaaaaaaac
 20
chaebhajichaibcehffa
ieehiiicgghgcbbjfghh
dbafgjdhgjgichgabaaa
aabhecbhacbcaabgbaaa
ehhbfbjgbegfabadgbab
hjeeheaebfcajgdceggc
gfiahieagifiafgadjji
acddbcaajffbgabaajbb
abdbgghefhedbeecibif
cdbfbheffcchieegaafb
bbecjgbcjdfeadfbbgbc
dacabgcghaebhdagchfi
aechbbggjbbebiahjcgh
eehidgbacbfddeiejgif
heaafaajbhadadhhjbjb
baedjddjbcchjiibecgb
ggghbjffafffjagaibdj
dbbjehaeiciibabhbihe
bbjdjbjajaajgdjgfifh
afjegcjddccacgbcgaib
 4
xybb
zcbb
aacb
aaac
 20
abbbaaaabbbabaaaabbb
baaabbaaababbbaaaaba
baaababababbbbbabbbb
bbaabaaaaababbbababb
baaabaaaabbaaabaaaaa
bbaaaabaaabababbbabb
bbaaaaabbbbabbbbbaab
bababbabbaaabbbaaaba
aabaaaaabababbaaaaba
ababbbbbabaaaababbaa
abbaaaabbaaaaaabbaaa
abaaabbaaaabaaaaabab
aabbababbabaaabbbbab
aababbbabbaababbabba
babbbabbabbbbaabaabb
abaabbbabbbbaaaababb
abaababbbbbabbbaabaa
bbbabbbabbbabbbbbbba
ababbbbabbbbbbbaaaaa
aabaababbaabaababbab
 20
bbbaaaaaabaaaabbbaab
aaaabbababbabaaaabaa
baababaaaabbbbabbaba
abbbabbbaabbbbaaabbb
abbabbabbabbbbbaaabb
abbaaaaabbabbaaaabab
bbbbbabbaabbabaababa
ababbabaabbabaaaabba
abbaababbababbbaabba
bbaaaaabbbabbbbababb
abaaababbbabaaaaaaaa
abaaabbababbabbabaaa
abaababbbbaaaaaaaabb
baabbababaabbabaabbb
babababbababaaaabbba
bababbababbaabbbbabb
baababbababbaaababba
bbabbbababbbbabbbbba
aaaabbabbabbbabaaabb
bbbbbaaaaabbbaabbaba
 20
bacccbaabccbbcbcccac
abbcccbbbccbaccbcacc
bcbababbbcbcacaabbcc
baacbcbabaacacbacbbb
bacbcbbabbbcaabbcbaa
cbbaacaaaabaabaabbba
cbacacabcbbbcaccacca
bcaacbbacaabababbaaa
babbcbbacccbcaaacaab
bcabbaabcacccccbbbcb
caabbbaccabccbcccbba
bbccbcabaccaababbbcc
caabaaacabcabbacbaba
abbacccbbcbcbbbcaacc
acbbaaccaaacabbaabcb
cccbbacaccacaccbaaab
bbcbaaaacacbacaaccba
cabbbabbcbbccabbbaba
bcccbaccbaaccabcabbc
cbaababbcbabbcababac
 20
edcggcaggihffffidahc
feejgjcdjgghchjcbcdd
jjcfjhgcifieeagcgcbg
igdedgafdefceiaciedf
jfcfcbgdiabhjdfjfahd
iahebfjjaihejajfefch
hedgiaihgeebcffgfhaj
eihffjijejgfciadedbj
beefbjeicicdfgfhidei
gbjhfjghbfifccieciah
ejiddhgjgceadhfcfbdc
aiicfhgaiaecgbjjggfj
cefcihiibeefeiahhifc
cjeiehejifjiibbihgde
dgidhhgcedfbhgdafdjc
ehdejfghaeihjghgfgdi
dhaeeghajefccdcdaegg
fijiccjjahifhfcdeddc
ebchhgfhjchdijjcecde
gccdhehgjhdgajghhchi
 20
uzdvaqcwajxbabpcsobt
iwznfrglabpbmyjbmaac
gtfdbjswrdxbdofbqfoj
badeaybafjvkybcdkuks
chjehabcabxbwmwpiibb
irbkyabrbmaevbbaohcg
leeabbxbaazgaubjsadn
azdmzccdacowkrdcnpjm
uvfjbqbatmbybobavalx
ioazafaabbxnsbbpkxbl
lxoaokcebktzkawyjfxj
ryjjradcgwaabwdafeab
tubibakbonxtbvoikabh
rivcacbwxbhyqhltcdbo
sracjwrabykumbbblyat
kicaobdbbbjlsybwaibv
bpautxajjajyakrabrbb
bbtwnhabbzbbfbsbfnnb
weaatbbyxrabwbwmpkan
uqalagooybdglaaybbbb
 1
c
 20
oaiarbubqatbubhamaxa
asaxawaybqbgbebsasbd
lbvbybubkblacbyblbmb
bebsbyakbxbgaxbsbpah
mbibjbfarapajboanbvb
bdanayamacbibpaqbubp
qanakbuarbzboambgbfb
asavbgagazanbubebnbg
waiayaxasbybobpbgadb
akbnaqboauawafblbcap
wbgaxbgatbtarbhblbqb
anbvbcacarapbpbraxas
xaladaratbebobubkbsb
adbobtaoaubjahbkbzao
nbfbnbnaqbwaoafbkava
byakbkahbcambhatboaq
oafbubnatasakaybwbza
azaebyawbkbmbgaxacbk
tbdagagbgaebpbebeaga
bfahbwbfbsbhboasaxay
 20
bvbobfbqafbibeadbsbx
sadbrapbjafaralazbua
awbhbqbtaibwbibcbybz
vavbcaubtbzasawavbea
blbcasbjbsaxasbgbdbe
hbdboafbgakbuahbpapb
azamazbpbiapaladayae
gbnavbgakboaybrahbga
bmbdafbtbqaibybrbgbz
pakblbwaqanahbdaebxb
bubpbkbhayacblbpaeag
dafbwbnbfambhaxbsbgb
bkbyajaqalaqanaibyam
qblbsbhbgasacbgbxayb
aebgblbkacbhbqbxapap
gapahbuataxbqayblbma
bybsanaybqakaubmbxbr
mafapbebcaubvaebgbfb
ajbkahbrbhbkboadboag
hbxaubtayaiatbuapbib
 20
abcdefghijklmnopqrst
bcdefghijklmnopqrstu
cdefghijklmnopqrstuv
defghijklmnopqrstuvw
efghijklmnopqrstuvwx
fghijklmnopqrstuvwxy
ghijklmnopqrstuvwxyz
hijklmnopqrstuvwxyza
ijklmnopqrstuvwxyzab
jklmnopqrstuvwxyzabc
klmnopqrstuvwxyzabcd
lmnopqrstuvwxyzabcde
mnopqrstuvwxyzabcdef
nopqrstuvwxyzabcdefg
opqrstuvwxyzabcdefgh
pqrstuvwxyzabcdefghi
qrstuvwxyzabcdefghij
rstuvwxyzabcdefghijk
stuvwxyzabcdefghijkl
tuvwxyzabcdefghijklm
 20
khbehaamsrbbubavfkdo
knswbbdgawcgblradain
bgmozbhrabpixgizifqz
oeeeiclkkbuhaaedtvna
bhbxarbbtblouaflabpa
iagwlgjpabpvyyvgobam
jikuvcsaassmjabbnlam
oqyofmbkgzodbnvaaltu
oitbalbfzpbaseoazbbm
dthvtkaspaxyxfstoaol
pqcgdywcrkbrbhltarzu
hwsxgdffnunmrmbbufhe
jdjnzekaiebadhgbabqf
pfmaoeiraabuhhroykbb
gjzkasbaquaawarbyxny
rbpjcumnsfcbbhgarrsj
akunwbbgyppasqociszi
tagaamvkbumqdomxgddy
kaqbttozndsbcvadebvh
sywrtlasaicgcaydergp
 20
aqvnqrqtxybcdoecggdk
dajtdjnalonijmemduqv
pgaltacyamsbaihxnaak
foaaiohezzlkbxzqnkar
vjxfacirwltinhsrgebn
uvfhwazcycuqnwrybsrw
zfqlahatszieyomnaakj
lzqbbjiatuyzkcxoirmr
rkdsriweawufgizhslzh
efsghqkdnaucpkbvwuwu
mtujsceswcayhtiwscts
fommpuywlouahbxfdaun
ggjpmdeokcfpaviurvvb
oewjyeducmgnpadavven
tzrwzsmlokugdxaqzhuw
kgolfsotletiiluahzjm
vsbninjmmbaxcqchauhy
gdjmigoyvabuqkqusado
gvzgdjcjbobuwyiuhgai
fgjqinwqavihyiybhlna
 20
zrnrzegohxlxpogmepxb
eitpidtxjoxctxicfpwa
hepfvyxvocfdlwdgyeyv
lvlpdqmumlsdbqkwqtvb
feecyfjfdtnhjwxdbhbb
tnvzrkrfyyncotyvkfdn
vojebvluyjatwgwsktlt
mmmibhkuuqglyxkscvnu
mlqsgjngqfimlgveiwiw
sgkvxngykaumcqvukgpv
zxjjyurnwhupwlxzxtjr
uvppwmwqhoddshoclrbi
svcblkyfhpyewpnaksvr
itezugbodzdcnepaobis
pekywiexisjvbxnkvnsm
allteystxlcbztscmhhr
jasmvlgpxikmdehhgajc
azphhivnvonwphceyqtx
zwgqnyxbhcbymowwgpgc
xknsxgnefyxahicpyvlz
 20
ybsaatjppdanghmrbhua
eflldubavzoeaatggaeb
ifzcbautfqqlbxcqpedf
cmubpldtchpifacwykas
axzazcalaasxeugqbtrp
flbcbbdbahjbabfaiaka
mbpbmbbqbswwvttpaega
rmusgcepeaofuainuvco
bpceeqjgaunvzmtrczba
enxvyrupanafiwlwabtk
yamakebaudbuuynkaaqq
lilgpwhaoblsfyqnbbpb
csbwapbjbhhebqgmzzbb
tqdjfcuxkanurrtrbyal
myahutmqbwgvisbazhav
zduatubagidakmooxddy
giibazwbaufxtlgdvbph
utbmmgthpngbzqowvvjb
etbkflzjdlavabxaqzsd
bhblygobxhpfxxqcnvod
 20
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
abcdefghijklmnopqrst
 20
aaacacbaabcabacbacaa
aabcaccaacacacbccaab
baacababcabaaaaaabbb
abbcccccbaccbbcbacbb
accbcabcbbcaaaacbbbb
acbbccbccaacbabbabca
ccaaaccbccaccaaabcab
acabaaabcccaabbbbaca
baccbbabaabbabcbccac
abbacaabaaccaccacbbb
cccacbcababbaaccabaa
acaacaaaaacbcaacabba
ccccccbaaaabccabbaab
cbbbbabbacbcbacbcbaa
caaabcbccacbbbaaabba
cccbbabccbabaaaaabca
cccbbcacbccbcccbaaab
aababcccbaaccaababaa
bacbccacbaabaaacaaba
abacabaaccbabcccabcc
 1
a
 20
abccabcaaacacbbcbbcb
bccbcbcbbacbcbaccaaa
bacbaabbabcbacccacca
abcccabaabbbcacccaaa
cccbaabbabcbcbcbcbab
aaabbaacacabacaaaaba
cbccbaaccbabaacaaaab
abbaabcaacabcacabccb
ccccbaabccccbcbbbbcc
aacbaaaaacbbcbbccbab
aabbcacccbbacbccbaba
cacbbccabcbaaabcbcac
abaaaccbbabbbcaacacc
ccabaabacabccbbbbbac
abbbacbabcbabcbabcba
cbcbbcaabbbaccbbacbc
abbbbacbaccaabcaaccc
abacabaabcbabaccbcbc
cabbaacabbcccaacbbac
accbaaacabaccbabaacc
 20
aaccaacabacbcaabcacc
aaccaccbbaccbacacabb
caaaabcaccccbcaabcbb
bccacbcabbaabacabcab
ccbcabbaacaaaabcbcba
bcabbabacacbacacacca
ccaabbbaabcaacbacccb
bacaaaacaacabbaabbca
cabbacacaaabcbaabbbc
ccbcbcacbbbcbaabacba
ababbcccbacaacbacabc
aaaacbacabbccbaaacaa
cbaccccbcaabccccccaa
cbbabcbaccbcbaabccba
ccbbcbaababbaabcbcac
bcccacaabaaacaacacac
bccbbaabcbabbcaacbab
abacacbcabbaacacaacb
bbaabbccbbaccaaabccb
cccaaabcaaaaaacaacac
 1
b
 20
mmntzzrsitclutzhkcou
zwpgdogrwagdtbvliuxx
dhipksiktttpelynvxlu
wkitvyckzbnvwqkqkkxy
nnotloehlyyhkqcewbla
qxzkvuijildyszddovpt
efhyztqwwsijorvtftom
rrxfewjfbmfopvskrwuj
mpwgprwazcbjremrxipk
nsnbjgasuldpskwzavfx
rwfuqyyckhpmiujjkzlp
ahzenvabhuzgajsiises
qshjzubveglhwkkkcbcq
mczoikohtmsbscwfivaz
djfyltmjeazdhndjasbu
kbsymhsnxzmvzfdbirji
eqdvnlbjfbqpslvgfbqs
epmvqkxxlagarympgiyc
jezsohdohceyyjnvhwuu
xeetyvwgwtrtcnxxpnoz
 20
aaaaabbbbabaaababbbb
aabbbabbbaabbaaaaaba
bbaabbababbbaabbbabb
babbbbbbaabbabbabaab
bbaaabbabbbabbaabbba
aaaaabbaabbbaaaababa
babababbbaabbaaaaaaa
abbbbabaaaabbbbbabab
bbbabbaabbabbbaaabba
bbaabbabbaaabaabbbba
abaaaaabaabaaabbabaa
aabababbababaaaaabbb
aabababaabbabaaaaabb
aaaaababbbaabaaababa
abbaabbabaabbababbaa
aaabaaababbaaaaabaab
abababaaaaaabaabaaba
ababaaaabbbaaaabaaaa
abaabaabbabaaabaabaa
abaaababbaabababbbbb
 20
basomhbaekaewfabbeia
hgbbwattbsaataobyabj
jcbmpbarwwmaueaacokn
ubanabxbzeubapbbabaq
axiabdablvhpozaunasx
bgebwfxafbqbbvlabaez
ybhpudnjdbaqnwpoahlb
gcgsbpwbhqrfcqlboahg
ruauzjbbbbebrvsmaqhb
fbcsbwuonaqovgyabhki
wbgoraabbmbweoiubnbz
bibveapkataybsubeanb
zbmfbabngqaatbbblzbv
xavlabuaajlvqbaybbld
whwrloczembvvaeabbjn
urxzdbbgaobbfzdihaae
obanhigmjabttvsabydw
oahbajkybapbibiaonbf
ugvsavwakbsomhhbbcam
aawpbvbishubbclnjkpk
 20
cbccccacabacacaaaccc
acacccbbccbbcacbaaca
aaababccbbbbccaccbbc
bbbbcacbacbcbbbaabcc
baaccbbaaaaccbabbaaa
bcbbbbcbbcacaaaacaaa
aaabccaabbbbaaabccbb
cccabbacaacaacaccbaa
aacbbaccbacaacbcccba
baacbabccabacaccabcc
cbaaccaaabccacccaccb
abcbbbbacccccaaababc
aacaabcbcaaccbbcbcca
babccabbbabbcacaabcb
bcaaabbbcaabcaaaacac
cbacbccbbbaaabccbbba
ccbbcabaccacbcccccac
cacabababcbcabccabbc
ababbbcbabcbbacccbcb
bacaccaaccccbbbbcbaa

FIRST
 DRAW
 FIRST
 FIRST
 SECOND
 FIRST
 DRAW
 SECOND
 SECOND
 SECOND
 FIRST
 FIRST
 SECOND
 SECOND
 FIRST
 SECOND
 FIRST
 FIRST
 SECOND
 DRAW
 FIRST
 SECOND
 DRAW
 SECOND
 FIRST
 FIRST
 SECOND
 DRAW
 FIRST
 FIRST
 SECOND
 FIRST
 SECOND
 SECOND
 FIRST
 SECOND
 FIRST

import sys

n = map(int,raw_input().split())[0]

ls_map = []
for i in range(n):
    ls_map.append(raw_input())

dp = [[0] * n for x in range(n)]



#print ls_map
#print dp

for i in range(n-1, -1, -1):
    for j in range(n-1, -1, -1):
        if ls_map[i][j] == 'a':
            dp[i][j] += 1
        if ls_map[i][j] == 'b':
            dp[i][j] -= 1
        
        # Minimize on even, max on odd
        fc = min if (i+j) % 2 == 0 else max
        
        if i != n-1 and j != n-1:
            if ls_map[i][j+1] == ls_map[i+1][j]:
                fc = min if fc== max else max
        
        allp = []
        if i != n-1:
            allp.append(dp[i+1][j])
        if j != n-1:
            allp.append(dp[i][j+1])
        choice = 0 if len(allp) == 0 else fc(allp)
        
        dp[i][j] += choice
        #print i, j, choice, dp[i][j], fc, allp

#for i in range(n):
#   for j in range(n):
#       if dp[i][j] >= 0:
#           print ' ' + str(dp[i][j]),
#       else:
#           print dp[i][j],
#   print
#print

if dp[0][0] == 0:
    print 'DRAW'
else:
    s_ret = 'FIRST' if dp[0][0] > 0 else 'SECOND'
    
    print s_ret

        
    
    