-er a-a a-b a-c aaa aab aac aae aaf aag aah aan aao aar aau ab- aba abb abc abe abf abg abh abn abo abr abu ac- aca acb acc ace acf acg ach acn aco acr acu aea aeb aec aee aef aeg aeh aen aeo aer aeu af- afa afb afc afe aff afg afh afn afo afr afu ag- aga agb agc age agf agg agh agn ago agr agu aha ahb ahc ahe ahf ahg ahh ahn aho ahr ahu an- ana anb anc ane anf ang anh ann ano anr anu aoa aob aoc aoe aof aog aoh aon aoo aor aou ar- ara arb arc are arf arg arh arn aro arr aru au- aua aub auc aue auf aug auh aun auo aur b-u baa bab bac bae baf bag bah ban bao bar bau bba bbb bbc bbe bbf bbg bbh bbn bbo bbr bbu bca bcb bcc bce bcf bcg bch bcn bco bcr bcu be- bea beb bec bee bef beg beh ben beo ber beu bfa bfb bfc bfe bff bfg bfh bfn bfo bfr bfu bga bgb bgc bge bgf bgg bgh bgn bgo bgr bgu bha bhb bhc bhe bhf bhg bhh bho bhr bhu bna bnb bnc bne bnf bng bnn bno bnr bnu boa bob boc boe bof bog boh bon boo bor bou bra brb bre brf brg brh brn bro brr bru bua bub buc bue buf bug buh bun buo bur buu c-- caa cab cac cae caf cag cah can cao car cau cba cbb cbc cbe cbf cbg cbh cbn cbo cbr cbu cca ccb ccc cce ccf ccg cch ccn cco ccr ccu ce- cea ceb cec cee cef ceg ceh cen ceo cer ceu cfa cfb cfc cfe cff cfg cfh cfn cfo cfr cfu cga cgb cgc cge cgg cgh cgn cgo cgr cgu ch- cha chb chc che chf chg chh chn cho chr chu cn- cna cnb cnc cne cnf cng cnh cnn cno cnr cnu co- coa cob coc coe cof cog coh con coo cor cou cra crb crc cre crf crg crh crn cro crr cru cua cub cuc cue cuf cug cuh cun cuo cur cuu eaa eab eac eae eaf eag eah ean eao ear eau eba ebb ebc ebe ebf ebg ebh ebn ebo ebr ebu ec- eca ecb ecc ece ecf ecg ech ecn eco ecr ecu eea eeb eec eee eef eeg een eeo eer ef- efa efb efc efe eff efg efh efo efr ega egb egc ege egf egg egh egn ego egr egu eha ehb ehc ehe ehf ehg ehh ehn eho ehr ehu en- ena enb enc ene enf eng enh enn eno enr enu eo- eoa eob eoc eoe eof eog eoh eon eoo eor eou era erb erc ere erf erg erh ern ero err eru eu- eua eub euc eue euf eug eun eur faa fab fac fae faf fag fah fan fao far fau fba fbb fbc fbe fbf fbg fbh fbn fbo fbr fbu fca fcb fcc fce fcf fcg fcn fco fcr fcu fea feb fec fee fef feg feh fen feo fer feu ffa ffc ffe fff ffg ffh ffn ffo ffr ffu fga fgb fgc fge fgf fgg fgh fgn fgr fha fhb fhc fhe fhf fhg fhh fhn fho fhr fna fnb fnc fne fnf fng fnh fnn fnr fnu foa fob foc foe fof fog foh fon foo for fou fra frb frc fre frf frg frh frn fro frr fru fua fub fue fuf fug fun fuo fur fuu gaa gab gac gae gaf gag gah gan gao gar gau gba gbc gbe gbf gbg gbh gbn gbo gbr gbu gca gcb gcc gce gcf gcg gch gcn gco gcr gcu ge- gea geb gec gee gef geg geh gen geo ger geu gfa gfb gfc gfe gff gfh gfo gfr gga ggb ggc ggg ggh ggn ggo ggr ggu gha ghb ghc ghe ghg ghh ghn gho ghr gna gnb gnc gne gnf gnn gno gnr gnu goa gob goc goe gof gog goh gon goo gor gou gra grb grc gre grf grg grh grn gro grr gru gu- gua gub guc gue guf gug gun guo gur guu haa hab hac hae haf hag hah han hao har hau hba hbb hbc hbe hbf hbg hbh hbn hbo hbr hbu hca hcb hcc hce hcf hcg hch hcn hco hcr he- hea heb hec hee hef heg heh hen heo her heu hfa hfb hfc hfe hff hfg hfh hfn hfo hfr hfu hga hgb hgc hge hgf hgg hgh hgn hgo hgr hgu hha hhb hhc hhe hhf hhg hhh hhn hho hhr hhu hna hnb hnc hne hnf hng hnh hnn hno hnu hoa hob hoc hoe hof hog hoh hon hoo hor hou hr- hra hrb hrc hre hrf hrg hrh hrn hro hrr hru hua hub huc hue huf hug huh hun huo hur huu naa nab nac nae naf nag nah nan nao nar nau nba nbb nbc nbe nbf nbg nbn nbo nbr nbu nca ncb ncc nce ncf ncg nch ncn nco ncr ncu ne- nea neb nec nee nef neg neh nen neo ner neu nfa nfb nfc nfe nff nfn nfo nfr nfu nga ngb ngc nge ngf ngg ngh ngn ngo ngu nha nhb nhc nhe nhf nhg nhh nhn nhr nhu nna nnb nnc nne nnf nng nnh nnn nno nnu no- noa nob noc noe nof nog noh non noo nor nou nra nrb nrc nre nrf nrg nrn nro nrr nru nua nub nuc nue nug nuh nun nuo nur nuu oaa oab oac oae oaf oag oah oan oao oar oau ob- oba obb obc obe obf obg obh obn obo obr obu oc- oca ocb occ ocf ocg och ocn oco ocr ocu oea oeb oec oee oef oeg oeh oen oeo oer