-er a-a a-b a-i a-t aaa aab aae aag aai aan aao aar aat aau ab- aba abb abe abg abi abn abo abr abt abu aea aeb aee aeg aei aen aeo aer aet aeu ag- aga agb age agg agi agn ago agr agt agu ai- aia aib aie aig aii ain aio air ait aiu an- ana anb ane ang ani ann ano anr ant anu aoa aob aoe aog aoi aon aoo aor aot aou ar- ara arb are arg ari arn aro arr art aru at- ata atb ate atg ati atn ato atr att atu au- aua aub aue aug aui aun auo aur aut b-u baa bab bae bag bai ban bao bar bat bau bba bbb bbe bbg bbi bbn bbo bbr bbt bbu be- bea beb bee beg bei ben beo ber bet beu bga bgb bge bgg bgi bgn bgo bgr bgt bgu bi- bia bib bie big bii bin bio bir bit biu bna bnb bne bng bni bnn bno bnr bnt bnu boa bob boe bog boi bon boo bor bot bou bra brb bre brg bri brn bro brr brt bru bta btb bte btg bti btn bto btr btt btu bua bub bue bug bui bun buo bur but buu eaa eab eae eag eai ean eao ear eat eau eba ebb ebe ebg ebi ebn ebo ebr ebt ebu eea eeb eee eeg een eeo eer eet ega egb ege egg egi egn ego egr egt egu eia eib eie eig eii ein eio eir eit eiu en- ena enb ene eng eni enn eno enr ent enu eo- eoa eob eoe eog eoi eon eoo eor eot eou era erb ere erg eri ern ero err ert eru eta etb ete etg eti etn eto etr ett etu eu- eua eub eue eug eui eun eur eut gaa gab gae gag gai gan gao gar gat gau gba gbe gbg gbi gbn gbo gbr gbt gbu ge- gea geb gee geg gei gen geo ger get geu gga ggb ggg ggi ggn ggo ggr ggt ggu gia gib gie gig gii gin gio gir git giu gna gnb gne gni gnn gno gnr gnt gnu goa gob goe gog goi gon goo gor got gou gra grb gre grg gri grn gro grr grt gru gta gtb gte gtg gti gtn gto gtr gtt gtu gu- gua gub gue gug gui gun guo gur gut guu ia- iaa iab iae iag iai ian iao iar iat iau iba ibb ibe ibg ibi ibn ibo ibr ibt ibu ie- iea iee ieg iei ien ier iet iga igb ige igg igi ign igo igr igt igu iia iib iie iii iin iio iir iit iiu in- ina inb ine ing ini inn ino inr int inu io- ioa iob ioe iog ioi ion ioo ior iot iou ir- ira irb ire irg iri irn iro irr irt iru ita itb ite itg iti itn ito itt itu iu- iua iub iue iug iui iur iut n-i naa nab nae nag nai nan nao nar nat nau nba nbb nbe nbg nbi nbn nbo nbr nbt nbu ne- nea neb nee neg nei nen neo ner net neu nga ngb nge ngg ngi ngn ngo ngt ngu nia nib nie nig nii nin nio nir nit niu nna nnb nne nng nni nnn nno nnt nnu no- noa nob noe nog noi non noo nor not nou nra nrb nre nrg nri nrn nro nrr nrt nru nta ntb nte ntg nti ntn nto ntr ntt ntu nua nub nue nug nui nun nuo nur nut nuu o-i oaa oab oae oag oai oan oao oar oat oau ob- oba obb obe obg obi obn obo obr obt obu oea oeb oee oeg oei oen oeo oer oet oga oge ogg ogi ogn ogo ogt oia oib oie oii oin oio oir oit oiu on- ona onb one ong oni onn ono onr ont onu oo- ooa oob oog ooi oon ooo oor oot or- ora orb ore org ori orn oro orr ort oru ot- ota otb ote otg oti otn oto otr ott otu ou- oua oue oui oun ouo our out ra- raa rab rae rag rai ran rao rar rat rau rba rbb rbe rbg rbi rbn rbo rbr rbt rbu re- rea reb ree reg rei ren reo rer ret reu rga rgb rge rgg rgi rgn rgo rgr rgt ria rib rie rig rii rin rio rir rit rna rnb rng rni rnn rno rnr rnt rnu roa rob roe rog roi ron roo ror rot rou rra rrb rrg rri rrn rrr rrt rru rta rtb rte rtg rti rtn rto rtr rtt rtu rua rub rue rug rui run ruo rur rut ruu taa tab tae tag tai tan tao tar tat tau tba tbb tbe tbg tbi tbn tbo tbr tbt tbu te- tea teb tee teg tei ten teo ter tet teu tga tgb tge tgg tgi tgn tgo tgr tgt tgu tia tib tie tig tii tin tio tir tit tiu tna tnb tne tng tni tnn tno tnr tnt to- toa tob toe tog toi ton too tor tot tou tra trb tre trg tri trn tro trr trt tru tta ttb tte ttg tti ttn tto ttr ttt ttu tua tub tue tug tui tun tuo tur tut tuu ua- uaa uab uae uag uai uan uao uar uat uau uba ubb ube ubg ubi ubn ubo ubr ubt ubu uea ueb uee ueg uei uen uer uet uga ugb uge ugg ugi ugn ugo ugr ugt ugu uia uib uie uig uii uin uio uir uit uiu un- una unb une ung uni unn uno unr unt unu uoa uob uoe uog uon uoo uor uot ur- ura urb ure urg uri urn uro urr urt uru uta utb ute uti utn uto utr utt utu uua uue uug uun uur uut