-er a-a a-b a-c aaa aab aac aae aaf aah aak aan aao aar aau ab- aba abb abc abe abf abh abk abn abo abr abu ac- aca acb acc ace acf ach ack acn aco acr acu aea aeb aec aee aef aeh aek aen aeo aer aeu af- afa afb afc afe aff afh afk afn afo afr afu aha ahb ahc ahe ahf ahh ahk ahn aho ahr ahu aka akb akc ake akh akk akn ako akr aku an- ana anb anc ane anf anh ank ann ano anr anu aoa aob aoc aoe aof aoh aok aon aoo aor aou ar- ara arb arc are arf arh ark arn aro arr aru au- aua aub auc aue auf auh auk aun auo aur b-u baa bab bac bae baf bah bak ban bao bar bau bba bbb bbc bbe bbf bbh bbk bbn bbo bbr bbu bca bcb bcc bce bcf bch bck bcn bco bcr bcu be- bea beb bec bee bef beh bek ben beo ber beu bfa bfb bfc bfe bff bfh bfn bfo bfr bfu bha bhb bhc bhe bhf bhh bhk bho bhr bhu bka bkb bkc bke bkf bkk bkn bko bkr bna bnb bnc bne bnf bnk bnn bno bnr bnu boa bob boc boe bof boh bok bon boo bor bou bra brb bre brf brh brk brn bro brr bru bua bub buc bue buf buh buk bun buo bur buu c-- caa cab cac cae caf cah cak can cao car cau cba cbb cbc cbe cbf cbh cbk cbn cbo cbr cbu cca ccb ccc cce ccf cch cck ccn cco ccr ccu ce- cea ceb cec cee cef ceh cek cen ceo cer ceu cfa cfb cfc cfe cff cfh cfk cfn cfo cfr cfu ch- cha chb chc che chf chh chk chn cho chr chu cka ckb ckc ckh cko cn- cna cnb cnc cne cnf cnh cnn cno cnr cnu co- coa cob coc coe cof coh cok con coo cor cou cra crb crc cre crf crh crk crn cro crr cru cua cub cuc cue cuf cuh cuk cun cuo cur cuu eaa eab eac eae eaf eah eak ean eao ear eau eba ebb ebc ebe ebf ebh ebk ebn ebo ebr ebu ec- eca ecb ecc ece ecf ech eck ecn eco ecr ecu eea eeb eec eee eef eek een eeo eer ef- efa efb efc efe eff efh efo efr eha ehb ehc ehe ehf ehh ehn eho ehr ehu eka ekb ekc eke ekf ekh eko ekr eku en- ena enb enc ene enf enh enk enn eno enr enu eo- eoa eob eoc eoe eof eoh eok eon eoo eor eou era erb erc ere erf erh erk ern ero err eru eu- eua eub euc eue euf eun eur faa fab fac fae faf fah fak fan fao far fau fba fbb fbc fbe fbf fbh fbk fbn fbo fbr fbu fca fcb fcc fce fcf fck fcn fco fcr fcu fea feb fec fee fef feh fek fen feo fer feu ffa ffc ffe fff ffh ffk ffn ffo ffr ffu fha fhb fhc fhe fhf fhh fhn fho fhr fka fkb fkc fkf fkk fna fnb fnc fne fnf fnh fnk fnn fnr fnu foa fob foc foe fof foh fok fon foo for fou fra frb frc fre frf frh frk frn fro frr fru fua fub fue fuf fuk fun fuo fur fuu haa hab hac hae haf hah hak han hao har hau hba hbb hbc hbe hbf hbh hbk hbn hbo hbr hbu hca hcb hcc hce hcf hch hck hcn hco hcr he- hea heb hec hee hef heh hek hen heo her heu hfa hfb hfc hfe hff hfh hfk hfn hfo hfr hfu hha hhb hhc hhe hhf hhh hhk hhn hho hhr hhu hka hkb hkf hkh hkk hkn hko hkr hku hna hnb hnc hne hnf hnh hnk hnn hno hnu hoa hob hoc hoe hof hoh hok hon hoo hor hou hr- hra hrb hrc hre hrf hrh hrk hrn hro hrr hru hua hub huc hue huf huh huk hun huo hur huu ka- kaa kab kac kae kaf kah kak kan kao kar kau kba kbb kbc kbe kbf kbh kbk kbn kbo kbr kbu kca kcb kcc kce kch kck kcn kcr kcu ke- kea keb kec kee kef keh kek ken keo ker kfa kfc kff kfh kfo kfu kha khe khf khh khk khn kho khr khu kkb kkc kke kkh kkk kkn kkr kku kn- kna knc kne knf knk knn kno knr knu koa kob koc koe kof koh kok kon koo kor kou kra krc krf krk krn kro krr kru kub kuc kue kuh kuk kun kur kuu naa nab nac nae naf nah nak nan nao nar nau nba nbb nbc nbe nbf nbk nbn nbo nbr nbu nca ncb ncc nce ncf nch nck ncn nco ncr ncu ne- nea neb nec nee nef neh nek nen neo ner neu nfa nfb nfc nfe nff nfk nfn nfo nfr nfu nha nhb nhc nhe nhf nhh nhk nhn nhr nhu nka nkc nke nkf nkk nkn nko nkr nku nna nnb nnc nne nnf nnh nnk nnn nno nnu no- noa nob noc noe nof noh nok non noo nor nou nra nrb nrc nre nrf nrk nrn nro nrr nru nua nub nuc nue nuh nuk nun nuo nur nuu oaa oab oac oae oaf oah oak oan oao oar oau ob- oba obb obc obe obf obh obk obn obo obr obu oc- oca ocb occ ocf och ock ocn oco ocr ocu oea oeb oec oee oef oeh oen oeo oer of- ofa ofb ofc ofe off ofn ofo ofr ofu oha ohc ohe ohf ohh ohn oho ohr ohu oka okb okc oke okk oko okr oku on- ona onb onc one onf