-er a-a a-b a-c aaa aab aac aae aag aak aam aao aar ab- aba abb abc abe abg abk abm abo abr ac- aca acb acc ace acg ack acm aco acr aea aeb aec aee aeg aek aem aeo aer ag- aga agb agc age agg agk agm ago agr aka akb akc ake akg akk akm ako akr ama amb amc ame amg amk amm amo amr aoa aob aoc aoe aog aok aom aoo aor ar- ara arb arc are arg ark arm aro arr baa bab bac bae bag bak bam bao bar bba bbb bbc bbe bbg bbk bbm bbo bbr bca bcb bcc bce bcg bck bcm bco bcr be- bea beb bec bee beg bek bem beo ber bga bgb bgc bge bgg bgk bgm bgo bgr bka bkb bkc bke bkg bkk bkm bko bkr bma bmb bmc bme bmg bmk bmm bmo bmr boa bob boc boe bog bok bom boo bor bra brb bre brg brk brm bro brr c-- caa cab cac cae cag cak cam cao car cba cbb cbc cbe cbg cbk cbm cbo cbr cca ccb ccc cce ccg cck ccm cco ccr ce- cea ceb cec cee ceg cek cem ceo cer cga cgb cgc cge cgg cgm cgo cgr cka ckb ckc ckm cko cma cmb cmc cme cmg cmk cmm cmo cmr co- coa cob coc coe cog cok com coo cor cra crb crc cre crg crk crm cro crr eaa eab eac eae eag eak eam eao ear eba ebb ebc ebe ebg ebk ebm ebo ebr ec- eca ecb ecc ece ecg eck ecm eco ecr eea eeb eec eee eeg eek eem eeo eer ega egb egc ege egg egm ego egr eka ekb ekc eke ekg eko ekr em- ema emb emc eme emg emk emm emo emr eo- eoa eob eoc eoe eog eok eom eoo eor era erb erc ere erg erk erm ero err gaa gab gac gae gag gak gam gao gar gba gbc gbe gbg gbk gbm gbo gbr gca gcb gcc gce gcg gck gcm gco gcr ge- gea geb gec gee geg gek gem geo ger gga ggb ggc ggg ggm ggo ggr gka gkb gkm gko gma gmb gmc gme gmg gmm gmo gmr goa gob goc goe gog gok gom goo gor gra grb grc gre grg grk grm gro grr ka- kaa kab kac kae kag kak kam kao kar kba kbb kbc kbe kbk kbm kbo kbr kca kcb kcc kce kcg kck kcm kcr ke- kea keb kec kee keg kek kem keo ker kga kgb kgc kgm kgo kkb kkc kke kkk kkm kkr kma kmb kmc kme kmg kmk kmm kmo koa kob koc koe kog kok kom koo kor kra krc krg krk kro krr m-o m-r maa mab mac mae mag mak mam mao mar mba mbb mbc mbe mbg mbk mbm mbo mbr mc- mca mcb mcc mce mcg mck mcm mco mcr mea meb mec mee meg mek mem meo mer mga mgb mgc mge mgk mgm mgo mgr mka mkb mkc mke mkg mkk mkm mko mkr mma mmb mmc mme mmg mmk mmm mmo mmr moa mob moc moe mog mok mom moo mor mra mrb mrc mre mrg mrk mrm mro mrr oaa oab oac oae oag oak oam oao oar ob- oba obb obc obe obg obk obm obo obr oc- oca ocb occ ocg ock ocm oco ocr oea oeb oec oee oeg oem oeo oer oga ogc oge ogg ogo oka okb okc oke okg okk oko okr om- oma omb omc ome omg omm omo omr oo- ooa oob ooc oog ook oom ooo oor or- ora orb orc ore org ork orm oro orr ra- raa rab rac rae rag rak ram rao rar rba rbb rbc rbe rbg rbk rbm rbo rbr rca rcb rcc rce rcg rcm rco rcr re- rea reb rec ree reg rek rem reo rer rga rgb rgc rge rgg rgk rgo rgr rkb rkc rke rkg rkk rkm rko rma rmb rmc rme rmg rmm rmo rmr roa rob roc roe rog rok rom roo ror rra rrb rrc rrg rrk rrm rrr

a-ak a-be a-ok aaaa aaab aaac aaae aaam aaar aaba aabb aabc aabm aaca aacb aacc aace aack aacm aaco aacr aaea aaec aaem aage aaka aake aama aamb aamc aame aamo aamr aaoe aaoo aara aarc aare aarm aaro abaa abab abac abae abag abak abam abar abb- abba abbb abbe abbo abbr abca abcb abcc abcr abec abee aber abma abmb abmc aboa abob abok aboo abor abra abrc abro acaa acab acac acae acag acar acba acca accc acce accm acco ace- acea acec acek acem acer acga acgr acke acma acmc acme acmg acoa acoe acog acom acor acr- acra acrc acre acrm acro acrr aeac aecb aeer aega aeka aeom aer- aera aerc aero ag-o agac agag agam agao agar agba agbo agca agcc agce agco agea agee agem ager agga agge agma agmc agme agob agog agoo agra agre agro akaa akae akam akao akar akca akee akeg aker akka akko akok akom akr- akra akre amaa amac amae amag amam amar amb- amba ambe ambo ambr amca amcc amco amec amee amer amga amka amm- amma amme ammo amob amoc amog amok amoo amor amra amrc amro aoba aoca aoce aogm aoma aomg aora aorb arab arac arae arag arak aram arar arba arbe arc- arca arce arcm arco area arec aree areg arek arem areo arga argb arge argo arka arke arko arma armc arme armm armo aroa arob aroe arom aroo aror arr- arra arrc arre arrg arrk arro arrr baaa baak baam baar baba babb babe babm babo babr bac- baca bacc bace back baco baek baer baga bage bagg bago bak- baka bake bako bakr bama bamb bamc bame bamm bar- bara barb barc bare barg bark barm baro barr