-er a-a a-b a-i a-t aaa aab aae aaf aag aai aao aar aat aau ab- aba abb abe abf abg abi abo abr abt abu aea aeb aee aef aeg aei aeo aer aet aeu af- afa afb afe aff afg afi afo afr aft afu ag- aga agb age agf agg agi ago agr agt agu ai- aia aib aie aif aig aii aio air ait aiu aoa aob aoe aof aog aoi aoo aor aot aou ar- ara arb are arf arg ari aro arr art aru at- ata atb ate atf atg ati ato atr att atu au- aua aub aue auf aug aui auo aur aut b-u baa bab bae baf bag bai bao bar bat bau bba bbb bbe bbf bbg bbi bbo bbr bbt bbu be- bea beb bee bef beg bei beo ber bet beu bfa bfb bfe bff bfg bfi bfo bfr bft bfu bga bgb bge bgf bgg bgi bgo bgr bgt bgu bi- bia bib bie bif big bii bio bir bit biu boa bob boe bof bog boi boo bor bot bou bra brb bre brf brg bri bro brr brt bru bta btb bte btf btg bti bto btr btt btu bua bub bue buf bug bui buo bur but buu eaa eab eae eaf eag eai eao ear eat eau eba ebb ebe ebf ebg ebi ebo ebr ebt ebu eea eeb eee eef eeg eeo eer eet ef- efa efb efe eff efg efi efo efr eft ega egb ege egf egg egi ego egr egt egu eia eib eie eif eig eii eio eir eit eiu eo- eoa eob eoe eof eog eoi eoo eor eot eou era erb ere erf erg eri ero err ert eru eta etb ete etf etg eti eto etr ett etu eu- eua eub eue euf eug eui eur eut faa fab fae faf fag fai fao far fat fau fba fbb fbe fbf fbg fbi fbo fbr fbt fbu fea feb fee fef feg fei feo fer fet feu ffa ffe fff ffg ffi ffo ffr fft ffu fga fgb fge fgf fgg fgi fgr fgt fia fib fie fif fig fii fir fit fiu foa fob foe fof fog foi foo for fot fou fra frb fre frf frg fri fro frr frt fru fta ftb fte ftf ftg fti fto ftr ftt ftu fua fub fue fuf fug fui fuo fur fut fuu gaa gab gae gaf gag gai gao gar gat gau gba gbe gbf gbg gbi gbo gbr gbt gbu ge- gea geb gee gef geg gei geo ger get geu gfa gfb gfe gff gfi gfo gfr gft gga ggb ggg ggi ggo ggr ggt ggu gia gib gie gif gig gii gio gir git giu goa gob goe gof gog goi goo gor got gou gra grb gre grf grg gri gro grr grt gru gta gtb gte gtf gtg gti gto gtr gtt gtu gu- gua gub gue guf gug gui guo gur gut guu i-f ia- iaa iab iae iaf iag iai iao iar iat iau iba ibb ibe ibf ibg ibi ibo ibr ibt ibu ie- iea iee ief ieg iei ier iet ifa ifb ife iff ifg ifi ifo ifr ift ifu iga igb ige igf igg igi igo igr igt igu iia iib iie iif iii iio iir iit iiu io- ioa iob ioe iof iog ioi ioo ior iot iou ir- ira irb ire irf irg iri iro irr irt iru ita itb ite itf itg iti ito itt itu iu- iua iub iue iug iui iur iut o-i oaa oab oae oaf oag oai oao oar oat oau ob- oba obb obe obf obg obi obo obr obt obu oea oeb oee oef oeg oei oeo oer oet of- ofa ofb ofe off ofg ofi ofo ofr oft ofu oga oge ogf ogg ogi ogo ogt oia oib oie oif oii oio oir oit oiu oo- ooa oob oof oog ooi ooo oor oot or- ora orb ore orf org ori oro orr ort oru ot- ota otb ote otf otg oti oto otr ott otu ou- oua oue ouf oui ouo our out ra- raa rab rae raf rag rai rao rar rat rau rba rbb rbe rbf rbg rbi rbo rbr rbt rbu re- rea reb ree ref reg rei reo rer ret reu rfa rfb rfe rff rfg rfi rfo rfr rft rfu rga rgb rge rgf rgg rgi rgo rgr rgt ria rib rie rif rig rii rio rir rit roa rob roe rof rog roi roo ror rot rou rra rrb rrf rrg rri rrr rrt rru rta rtb rte rtf rtg rti rto rtr rtt rtu rua rub rue ruf rug rui ruo rur rut ruu taa tab tae taf tag tai tao tar tat tau tba tbb tbe tbf tbg tbi tbo tbr tbt tbu te- tea teb tee tef teg tei teo ter tet teu tfa tfb tfe tff tfg tfi tfo tfr tft tfu tga tgb tge tgf tgg tgi tgo tgr tgt tgu tia tib tie tif tig tii tio tir tit tiu to- toa tob toe tof tog toi too tor tot tou tra trb tre trf trg tri tro trr trt tru tta ttb tte ttf ttg tti tto ttr ttt ttu tua tub tue tuf tug tui tuo tur tut tuu ua- uaa uab uae uaf uag uai uao uar uat uau uba ubb ube ubf ubg ubi ubo ubr ubt ubu uea ueb uee uef ueg uei uer uet ufa ufe uff ufg ufi ufo ufr uft ufu uga ugb uge ugf ugg ugi ugo ugr ugt ugu uia uib uie uif uig uii uio uir uit uiu uoa uob uoe uog uoo uor uot ur- ura urb ure urf urg uri uro urr urt uru uta utb ute utf uti uto utr utt utu uua uue uug uur uut uuu