-er a-a a-b a-i a-t aaa aab aae aaf aai aan aar aat aau ab- aba abb abe abf abi abn abr abt abu aea aeb aee aef aei aen aer aet aeu af- afa afb afe aff afi afn afr aft afu ai- aia aib aie aif aii ain air ait aiu an- ana anb ane anf ani ann anr ant anu ar- ara arb are arf ari arn arr art aru at- ata atb ate atf ati atn atr att atu au- aua aub aue auf aui aun aur aut b-u baa bab bae baf bai ban bar bat bau bba bbb bbe bbf bbi bbn bbr bbt bbu be- bea beb bee bef bei ben ber bet beu bfa bfb bfe bff bfi bfn bfr bft bfu bi- bia bib bie bif bii bin bir bit biu bna bnb bne bnf bni bnn bnr bnt bnu bra brb bre brf bri brn brr brt bru bta btb bte btf bti btn btr btt btu bua bub bue buf bui bun bur but buu eaa eab eae eaf eai ean ear eat eau eba ebb ebe ebf ebi ebn ebr ebt ebu eea eeb eee eef een eer eet ef- efa efb efe eff efi efr eft eia eib eie eif eii ein eir eit eiu en- ena enb ene enf eni enn enr ent enu era erb ere erf eri ern err ert eru eta etb ete etf eti etn etr ett etu eu- eua eub eue euf eui eun eur eut faa fab fae faf fai fan far fat fau fba fbb fbe fbf fbi fbn fbr fbt fbu fea feb fee fef fei fen fer fet feu ffa ffe fff ffi ffn ffr fft ffu fia fib fie fif fii fin fir fit fiu fna fnb fne fnf fni fnn fnr fnt fnu fra frb fre frf fri frn frr frt fru fta ftb fte ftf fti ftn ftr ftt ftu fua fub fue fuf fui fun fur fut fuu i-f ia- iaa iab iae iaf iai ian iar iat iau iba ibb ibe ibf ibi ibn ibr ibt ibu ie- iea iee ief iei ien ier iet ifa ifb ife iff ifi ifn ifr ift ifu iia iib iie iif iii iin iir iit iiu in- ina inb ine inf ini inn inr int inu ir- ira irb ire irf iri irn irr irt iru ita itb ite itf iti itn itt itu iu- iua iub iue iui iur iut n-i naa nab nae naf nai nan nar nat nau nba nbb nbe nbf nbi nbn nbr nbt nbu ne- nea neb nee nef nei nen ner net neu nfa nfb nfe nff nfi nfn nfr nft nfu nia nib nie nif nii nin nir nit niu nna nnb nne nnf nni nnn nnt nnu nra nrb nre nrf nri nrn nrr nrt nru nta ntb nte ntf nti ntn ntr ntt ntu nua nub nue nui nun nur nut nuu ra- raa rab rae raf rai ran rar rat rau rba rbb rbe rbf rbi rbn rbr rbt rbu re- rea reb ree ref rei ren rer ret reu rfa rfb rfe rff rfi rfn rfr rft rfu ria rib rie rif rii rin rir rit rna rnb rni rnn rnr rnt rnu rra rrb rrf rri rrn rrr rrt rru rta rtb rte rtf rti rtn rtr rtt rtu rua rub rue ruf rui run rur rut ruu taa tab tae taf tai tan tar tat tau tba tbb tbe tbf tbi tbn tbr tbt tbu te- tea teb tee tef tei ten ter tet teu tfa tfb tfe tff tfi tfn tfr tft tfu tia tib tie tif tii tin tir tit tiu tna tnb tne tnf tni tnn tnr tnt tra trb tre trf tri trn trr trt tru tta ttb tte ttf tti ttn ttr ttt ttu tua tub tue tuf tui tun tur tut tuu ua- uaa uab uae uaf uai uan uar uat uau uba ubb ube ubf ubi ubn ubr ubt ubu uea ueb uee uef uei uen uer uet ufa ufe uff ufi ufn ufr uft ufu uia uib uie uif uii uin uir uit uiu un- una unb une unf uni unn unr unt unu ur- ura urb ure urf uri urn urr urt uru uta utb ute utf uti utn utr utt utu uua uue uun uur uut uuu