-er a-a a-b a-i a-t aaa aab aae aag aai aan aao aap aar aat ab- aba abb abe abg abi abn abo abp abr abt aea aeb aee aeg aei aen aeo aep aer aet ag- aga agb age agg agi agn ago agp agr agt ai- aia aib aie aig aii ain aio aip air ait an- ana anb ane ang ani ann ano anp anr ant aoa aob aoe aog aoi aon aoo aop aor aot ap- apa apb ape apg api apn apo app apr apt ar- ara arb are arg ari arn aro arp arr art at- ata atb ate atg ati atn ato atp atr att b-p baa bab bae bag bai ban bao bap bar bat bba bbb bbe bbg bbi bbn bbo bbp bbr bbt be- bea beb bee beg bei ben beo bep ber bet bga bgb bge bgg bgi bgn bgo bgp bgr bgt bi- bia bib bie big bii bin bio bip bir bit bna bnb bne bng bni bnn bno bnp bnr bnt boa bob boe bog boi bon boo bop bor bot bpa bpb bpe bpg bpi bpn bpo bpp bpr bpt bra brb bre brg bri brn bro brp brr brt bta btb bte btg bti btn bto btp btr btt eaa eab eae eag eai ean eao eap ear eat eba ebb ebe ebg ebi ebn ebo ebp ebr ebt eea eeb eee eeg een eeo eep eer eet ega egb ege egg egi egn ego egp egr egt eia eib eie eig eii ein eio eip eir eit en- ena enb ene eng eni enn eno enp enr ent eo- eoa eob eoe eog eoi eon eoo eop eor eot ep- epa epb epe epg epi epn epo epp epr ept era erb ere erg eri ern ero erp err ert eta etb ete etg eti etn eto etp etr ett g-p gaa gab gae gag gai gan gao gap gar gat gba gbe gbg gbi gbn gbo gbp gbr gbt ge- gea geb gee geg gei gen geo gep ger get gga ggb ggg ggi ggn ggo ggp ggr ggt gia gib gie gig gii gin gio gip gir git gna gnb gne gni gnn gno gnp gnr gnt goa gob goe gog goi gon goo gop gor got gpa gpb gpe gpg gpi gpn gpo gpp gpr gpt gra grb gre grg gri grn gro grp grr grt gta gtb gte gtg gti gtn gto gtp gtr gtt ia- iaa iab iae iag iai ian iao iap iar iat iba ibb ibe ibg ibi ibn ibo ibp ibr ibt ie- iea iee ieg iei ien iep ier iet iga igb ige igg igi ign igo igp igr igt iia iib iie iii iin iio iip iir iit in- ina inb ine ing ini inn ino inp inr int io- ioa iob ioe iog ioi ion ioo iop ior iot ipa ipb ipe ipg ipi ipn ipo ipp ipr ipt ir- ira irb ire irg iri irn iro irp irr irt ita itb ite itg iti itn ito itp itt n-i naa nab nae nag nai nan nao nap nar nat nba nbb nbe nbg nbi nbn nbo nbp nbr nbt ne- nea neb nee neg nei nen neo nep ner net nga ngb nge ngg ngi ngn ngo ngp ngt nia nib nie nig nii nin nio nip nir nit nna nnb nne nng nni nnn nno nnp nnt no- noa nob noe nog noi non noo nop nor not npa npb npe npg npi npn npo npp npr npt nra nrb nre nrg nri nrn nro nrp nrr nrt nta ntb nte ntg nti ntn nto ntp ntr ntt o-i oaa oab oae oag oai oan oao oap oar oat ob- oba obb obe obg obi obn obo obp obr obt oea oeb oee oeg oei oen oeo oep oer oet oga oge ogg ogi ogn ogo ogp ogt oia oib oie oii oin oio oip oir oit on- ona onb one ong oni onn ono onp onr ont oo- ooa oob oog ooi oon ooo oop oor oot op- opa opb ope opg opi opn opo opp opr opt or- ora orb ore org ori orn oro orp orr ort ot- ota otb ote otg oti otn oto otp otr ott p-p paa pab pae pag pai pan pao pap par pat pba pbb pbe pbg pbi pbn pbo pbp pbr pbt pea peb pee peg pei pen peo pep per pet pga pgb pge pgg pgi pgn pgo pgp pgr pgt pia pib pie pig pii pin pio pip pir pit pn- pna pnb pne png pni pnn pno pnp pnr pnt poa pob poe pog poi pon poo pop por pot ppa ppb ppe ppg ppi ppn ppo ppp ppr ppt pra prb pre prg pri prn pro prp prr prt pt- pta ptb pte ptg pti ptn pto ptp ptr ptt ra- raa rab rae rag rai ran rao rap rar rat rba rbb rbe rbg rbi rbn rbo rbp rbr rbt re- rea reb ree reg rei ren reo rep rer ret rga rgb rge rgg rgi rgn rgo rgp rgr rgt ria rib rie rig rii rin rio rip rir rit rna rnb rng rni rnn rno rnp rnr rnt roa rob roe rog roi ron roo rop ror rot rpa rpb rpe rpg rpi rpn rpo rpp rpr rpt rra rrb rrg rri rrn rrp rrr rrt rta rtb rte rtg rti rtn rto rtp rtr rtt taa tab tae tag tai tan tao tap tar tat tba tbb tbe tbg tbi tbn tbo tbp tbr tbt te- tea teb tee teg tei ten teo tep ter tet tga tgb tge tgg tgi tgn tgo tgp tgr tgt tia tib tie tig tii tin tio tip tir tit tna tnb tne tng tni tnn tno tnp tnr tnt to- toa tob toe tog toi ton too top tor tot tpa tpb tpe tpg tpi