-al -ol a-a a-b a-c a-t aaa aab aac aae aaf aak aal aao aat ab- aba abb abc abe abf abk abl abo abt ac- aca acb acc ace acf ack acl aco act aea aeb aec aee aef aek ael aeo aet af- afa afb afc afe aff afk afl afo aft aka akb akc ake akk akl ako al- ala alb alc ale alf alk all alo alt aoa aob aoc aoe aof aok aol aoo aot at- ata atb atc ate atf atl ato att baa bab bac bae baf bak bal bao bat bba bbb bbc bbe bbf bbk bbl bbo bbt bca bcb bcc bce bcf bck bcl bco bct be- bea beb bec bee bef bek bel beo bet bfa bfb bfc bfe bff bfl bfo bft bka bkb bkc bke bkf bkk bkl bko bkt bla blb blc ble blf blk bll blo blt boa bob boc boe bof bok bol boo bot bta btb btc bte btf btk btl bto btt c-- caa cab cac cae caf cak cal cao cat cba cbb cbc cbe cbf cbk cbl cbo cbt cca ccb ccc cce ccf cck ccl cco cct ce- cea ceb cec cee cef cek cel ceo cet cfa cfb cfc cfe cff cfk cfl cfo cft cka ckb ckc cko ckt cl- cla clb clc cle clf clk cll clo clt co- coa cob coc coe cof cok col coo cot cta ctb ctc cte ctf ctk ctl cto ctt eaa eab eac eae eaf eak eal eao eat eba ebb ebc ebe ebf ebk ebl ebo ebt ec- eca ecb ecc ece ecf eck ecl eco ect eea eeb eec eee eef eek eel eeo eet ef- efa efb efc efe eff efl efo eft eka ekb ekc eke ekf ekl eko ekt ela elb elc ele elf elk ell elo elt eo- eoa eob eoc eoe eof eok eol eoo eot eta etb etc ete etf etk etl eto ett faa fab fac fae faf fak fal fao fat fba fbb fbc fbe fbf fbk fbl fbo fbt fca fcb fcc fce fcf fck fcl fco fct fea feb fec fee fef fek fel feo fet ffa ffc ffe fff ffk ffl ffo fft fka fkb fkc fkf fkk fkl fkt fla flb flc fle flf fll flo flt foa fob foc foe fof fok fol foo fot fta ftb ftc fte ftf ftk ftl fto ftt k-t ka- kaa kab kac kae kaf kak kal kao kat kba kbb kbc kbe kbf kbk kbl kbo kca kcb kcc kce kck kcl kct ke- kea keb kec kee kef kek kel keo ket kfa kfc kff kfo kkb kkc kke kkk kkl kkt kl- kla klb klc klf klo klt koa kob koc koe kof kok kol koo kot kta ktb ktc kte ktf ktk ktl kto ktt la- laa lab lac lae laf lak lal lao lat lba lbb lbc lbe lbf lbk lbl lbo lbt lca lcb lcc lce lcf lck lcl lco lct lea leb lec lee lef lek lel leo let lfa lfb lfc lfe lff lfk lfl lfo lft lka lkb lkl lkt lla llb llc lle llf llk lll llo llt loa lob loc loe lof lok lol loo lot lta ltb ltc lte ltf ltk ltl lto ltt oaa oab oac oae oaf oak oal oao oat ob- oba obb obc obe obf obk obl obo obt oc- oca ocb occ ocf ock ocl oco oct oea oeb oec oee oef oel oeo oet of- ofa ofb ofc ofe off ofl ofo oft oka okb okc oke okk okl oko ola olb olc ole olf olk oll olo olt oo- ooa oob ooc oof ook ool ooo oot ot- ota otb otc ote otf otk otl oto ott taa tab tac tae taf tak tal tao tat tba tbb tbc tbe tbf tbk tbl tbo tbt tca tcb tcc tce tcf tck tcl tco tct te- tea teb tec tee tef tek tel teo tet tfa tfb tfc tfe tff tfk tfl tfo tft tka tkb tkc tke tkk tkl tko tkt tla tlc tle tlf tlk tll tlo tlt to- toa tob toc toe tof tok tol too tot tta ttb ttc tte ttf ttk ttl tto ttt

a-ak a-be a-ok aaaa aaab aaac aaae aaaf aaal aaba aabb aabc aabl aabt aaca aacb aacc aace aacf aack aacl aaco aact aaea aaec aafa aafb aafc aaff aafl aaka aake aala aalc aale aall aalo aaoe aaoo aata aatc aatf aatk aatt abaa abab abac abae abaf abak abal abat abb- abba abbb abbe abbo abbt abca abcb abcc abcf abcl abct abec abee abel abet abff abla able ablo aboa abob abof abok abol aboo abot abta ac-t acaa acab acac acae acat acba acbl acca accc acce accf acco acct ace- acea acec acek acel acet acfc acfe acfl acft acke acla aclc acle acoa acoe acol acot acta actc acte actf actl acto actt aeac aeaf aecb aecl aect aeka aela aelc aeta aetc aetf aeto aett afaa afak afao afat afca afcb afcc afee afek afel afet affa affc affo afft afka afla aflc afle afoa afoe afol afoo afta aftc afte akaa akae akal akao akca akee akel akka akko akle aklo akok akot akte alaa alac alae alak alal alao alat alb- alba albc albe albo alca alcc alce alco alea alec alee alef alek aleo alet alfa alfe alk- alka alkb alke alko all- alla alle alll allo aloa aloc aloe alof alok alol aloo alot alta alte alto aoba aoca aoce aola aole aotc aotf at-l at-t ataa atab atac atae atak atal atat atca atcc atcf atck atcl atco atea atec atee atef atel ateo atfb atfc atfe atka atkt atla atle atlo atob atoc atoe atof atok atol atot atta atte atto baaa baaf baak baal baat baba babb babe babo bac- baca bacc bace back baco bact baek