-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aag aai aak aao aar aat ab- aba abb abc abe abg abi abk abo abr abt ac- aca acb acc ace acg aci ack aco acr act aea aeb aec aee aeg aei aek aeo aer aet ag- aga agb agc age agg agi agk ago agr agt ai- aia aib aic aie aig aii aik aio air ait aka akb akc ake akg aki akk ako akr aoa aob aoc aoe aog aoi aok aoo aor aot ar- ara arb arc are arg ari ark aro arr art at- ata atb atc ate atg ati ato atr att baa bab bac bae bag bai bak bao bar bat bba bbb bbc bbe bbg bbi bbk bbo bbr bbt bca bcb bcc bce bcg bci bck bco bcr bct be- bea beb bec bee beg bei bek beo ber bet bga bgb bgc bge bgg bgi bgk bgo bgr bgt bi- bia bib bic bie big bii bik bio bir bit bka bkb bkc bke bkg bkk bko bkr bkt boa bob boc boe bog boi bok boo bor bot bra brb bre brg bri brk bro brr brt bta btb btc bte btg bti btk bto btr btt c-- caa cab cac cae cag cai cak cao car cat cba cbb cbc cbe cbg cbi cbk cbo cbr cbt cca ccb ccc cce ccg cci cck cco ccr cct ce- cea ceb cec cee ceg cei cek ceo cer cet cga cgb cgc cge cgg cgi cgo cgr cgt ci- cia cib cic cie cig cii cik cio cir cit cka ckb ckc cki cko ckt co- coa cob coc coe cog coi cok coo cor cot cra crb crc cre crg cri crk cro crr crt cta ctb ctc cte ctg cti ctk cto ctr ctt eaa eab eac eae eag eai eak eao ear eat eba ebb ebc ebe ebg ebi ebk ebo ebr ebt ec- eca ecb ecc ece ecg eci eck eco ecr ect eea eeb eec eee eeg eek eeo eer eet ega egb egc ege egg egi ego egr egt eia eib eic eie eig eii eik eio eir eit eka ekb ekc eke ekg eki eko ekr ekt eo- eoa eob eoc eoe eog eoi eok eoo eor eot era erb erc ere erg eri erk ero err ert eta etb etc ete etg eti etk eto etr ett gaa gab gac gae gag gai gak gao gar gat gba gbc gbe gbg gbi gbk gbo gbr gbt gca gcb gcc gce gcg gci gck gco gcr gct ge- gea geb gec gee geg gei gek geo ger get gga ggb ggc ggg ggi ggo ggr ggt gia gib gic gie gig gii gik gio gir git gka gkb gko gkt goa gob goc goe gog goi gok goo gor got gra grb grc gre grg gri grk gro grr grt gta gtb gtc gte gtg gti gtk gto gtr gtt ia- iaa iab iac iae iag iai iao iar iat iba ibb ibc ibe ibg ibi ibk ibo ibr ibt ica icb icc ice icg ici ick ico icr ict ie- iea iec iee ieg iei iek ier iet iga igb igc ige igg igi igk igo igr igt iia iib iic iie iii iio iir iit ika ikb ikc ike iki ikk iko ikr ikt io- ioa iob ioc ioe iog ioi ioo ior iot ir- ira irb irc ire irg iri irk iro irr irt ita itb itc ite itg iti itk ito itt k-t ka- kaa kab kac kae kag kai kak kao kar kat kba kbb kbc kbe kbi kbk kbo kbr kca kcb kcc kce kcg kci kck kcr kct ke- kea keb kec kee keg kei kek keo ker ket kga kgb kgc kgi kgo kia kib kic kie kig kii kik kio kir kit kkb kkc kke kki kkk kkr kkt koa kob koc koe kog koi kok koo kor kot kra krc krg kri krk kro krr krt kta ktb ktc kte ktg ktk kto ktr ktt o-i oaa oab oac oae oag oai oak oao oar oat ob- oba obb obc obe obg obi obk obo obr obt oc- oca ocb occ ocg oci ock oco ocr oct oea oeb oec oee oeg oei oeo oer oet oga ogc oge ogg ogi ogo ogt oia oib oic oie oii oik oio oir oit oka okb okc oke okg oki okk oko okr oo- ooa oob ooc oog ooi ook ooo oor oot or- ora orb orc ore org ori ork oro orr ort ot- ota otb otc ote otg oti otk oto otr ott ra- raa rab rac rae rag rai rak rao rar rat rba rbb rbc rbe rbg rbi rbk rbo rbr rbt rca rcb rcc rce rcg rci rco rcr rct re- rea reb rec ree reg rei rek reo rer ret rga rgb rgc rge rgg rgi rgk rgo rgr rgt ria rib ric rie rig rii rik rio rir rit rkb rkc rke rkg rkk rko rkt roa rob roc roe rog roi rok roo ror rot rra rrb rrc rrg rri rrk rrr rrt rta rtb rtc rte rtg rti rtk rto rtr rtt taa tab tac tae tag tai tak tao tar tat tba tbb tbc tbe tbg tbi tbk tbo tbr tbt tca tcb tcc tce tcg tci tck tco tcr tct te- tea teb tec tee teg tei tek teo ter tet tga tgb tgc tge tgg tgi tgk tgo tgr tgt tia tib tic tie tig tii tik tio tir tit tka tkb tkc tke tkg tkk tko tkr tkt to- toa tob toc toe tog toi tok too tor tot tra trb trc tre trg tri trk tro trr trt tta ttb ttc tte ttg tti ttk tto ttr ttt

a-ak a-be a-ii a-ok aaaa aaab aaac aaae aaai aaar aaba aabb aabc aabi aabt aaca aacb aacc aace