-er a-a a-b a-i a-t aaa aab aae aaf aag aai aan aao aar aat ab- aba abb abe abf abg abi abn abo abr abt aea aeb aee aef aeg aei aen aeo aer aet af- afa afb afe aff afg afi afn afo afr aft ag- aga agb age agf agg agi agn ago agr agt ai- aia aib aie aif aig aii ain aio air ait an- ana anb ane anf ang ani ann ano anr ant aoa aob aoe aof aog aoi aon aoo aor aot ar- ara arb are arf arg ari arn aro arr art at- ata atb ate atf atg ati atn ato atr att baa bab bae baf bag bai ban bao bar bat bba bbb bbe bbf bbg bbi bbn bbo bbr bbt be- bea beb bee bef beg bei ben beo ber bet bfa bfb bfe bff bfg bfi bfn bfo bfr bft bga bgb bge bgf bgg bgi bgn bgo bgr bgt bi- bia bib bie bif big bii bin bio bir bit bna bnb bne bnf bng bni bnn bno bnr bnt boa bob boe bof bog boi bon boo bor bot bra brb bre brf brg bri brn bro brr brt bta btb bte btf btg bti btn bto btr btt eaa eab eae eaf eag eai ean eao ear eat eba ebb ebe ebf ebg ebi ebn ebo ebr ebt eea eeb eee eef eeg een eeo eer eet ef- efa efb efe eff efg efi efo efr eft ega egb ege egf egg egi egn ego egr egt eia eib eie eif eig eii ein eio eir eit en- ena enb ene enf eng eni enn eno enr ent eo- eoa eob eoe eof eog eoi eon eoo eor eot era erb ere erf erg eri ern ero err ert eta etb ete etf etg eti etn eto etr ett faa fab fae faf fag fai fan fao far fat fba fbb fbe fbf fbg fbi fbn fbo fbr fbt fea feb fee fef feg fei fen feo fer fet ffa ffe fff ffg ffi ffn ffo ffr fft fga fgb fge fgf fgg fgi fgn fgr fgt fia fib fie fif fig fii fin fir fit fna fnb fne fnf fng fni fnn fnr fnt foa fob foe fof fog foi fon foo for fot fra frb fre frf frg fri frn fro frr frt fta ftb fte ftf ftg fti ftn fto ftr ftt gaa gab gae gaf gag gai gan gao gar gat gba gbe gbf gbg gbi gbn gbo gbr gbt ge- gea geb gee gef geg gei gen geo ger get gfa gfb gfe gff gfi gfo gfr gft gga ggb ggg ggi ggn ggo ggr ggt gia gib gie gif gig gii gin gio gir git gna gnb gne gnf gni gnn gno gnr gnt goa gob goe gof gog goi gon goo gor got gra grb gre grf grg gri grn gro grr grt gta gtb gte gtf gtg gti gtn gto gtr gtt i-f ia- iaa iab iae iaf iag iai ian iao iar iat iba ibb ibe ibf ibg ibi ibn ibo ibr ibt ie- iea iee ief ieg iei ien ier iet ifa ifb ife iff ifg ifi ifn ifo ifr ift iga igb ige igf igg igi ign igo igr igt iia iib iie iif iii iin iio iir iit in- ina inb ine inf ing ini inn ino inr int io- ioa iob ioe iof iog ioi ion ioo ior iot ir- ira irb ire irf irg iri irn iro irr irt ita itb ite itf itg iti itn ito itt n-i naa nab nae naf nag nai nan nao nar nat nba nbb nbe nbf nbg nbi nbn nbo nbr nbt ne- nea neb nee nef neg nei nen neo ner net nfa nfb nfe nff nfi nfn nfo nfr nft nga ngb nge ngf ngg ngi ngn ngo ngt nia nib nie nif nig nii nin nio nir nit nna nnb nne nnf nng nni nnn nno nnt no- noa nob noe nof nog noi non noo nor not nra nrb nre nrf nrg nri nrn nro nrr nrt nta ntb nte ntf ntg nti ntn nto ntr ntt o-i oaa oab oae oaf oag oai oan oao oar oat ob- oba obb obe obf obg obi obn obo obr obt oea oeb oee oef oeg oei oen oeo oer oet of- ofa ofb ofe off ofg ofi ofn ofo ofr oft oga oge ogf ogg ogi ogn ogo ogt oia oib oie oif oii oin oio oir oit on- ona onb one onf ong oni onn ono onr ont oo- ooa oob oof oog ooi oon ooo oor oot or- ora orb ore orf org ori orn oro orr ort ot- ota otb ote otf otg oti otn oto otr ott ra- raa rab rae raf rag rai ran rao rar rat rba rbb rbe rbf rbg rbi rbn rbo rbr rbt re- rea reb ree ref reg rei ren reo rer ret rfa rfb rfe rff rfg rfi rfn rfo rfr rft rga rgb rge rgf rgg rgi rgn rgo rgr rgt ria rib rie rif rig rii rin rio rir rit rna rnb rng rni rnn rno rnr rnt roa rob roe rof rog roi ron roo ror rot rra rrb rrf rrg rri rrn rrr rrt rta rtb rte rtf rtg rti rtn rto rtr rtt taa tab tae taf tag tai tan tao tar tat tba tbb tbe tbf tbg tbi tbn tbo tbr tbt te- tea teb tee tef teg tei ten teo ter tet tfa tfb tfe tff tfg tfi tfn tfo tfr tft tga tgb tge tgf tgg tgi tgn tgo tgr tgt tia tib tie tif tig tii tin tio tir tit tna tnb tne tnf tng tni tnn tno tnr tnt to- toa tob toe tof tog toi ton too tor tot tra trb tre trf trg tri trn tro trr