-er a-a a-b a-i a-t aaa aab aae aag aai aan aao aap aar aas aat ab- aba abb abe abg abi abn abo abp abr abs abt aea aeb aee aeg aei aen aeo aep aer aes aet ag- aga agb age agg agi agn ago agp agr ags agt ai- aia aib aie aig aii ain aio aip air ais ait an- ana anb ane ang ani ann ano anp anr ans ant aoa aob aoe aog aoi aon aoo aop aor aos aot ap- apa apb ape apg api apn apo app apr aps apt ar- ara arb are arg ari arn aro arp arr ars art as- asa asb ase asg asi asn aso asp asr ass ast at- ata atb ate atg ati atn ato atp atr ats att b-p baa bab bae bag bai ban bao bap bar bas bat bba bbb bbe bbg bbi bbn bbo bbp bbr bbs bbt be- bea beb bee beg bei ben beo bep ber bes bet bga bgb bge bgg bgi bgn bgo bgp bgr bgs bgt bi- bia bib bie big bii bin bio bip bir bis bit bna bnb bne bng bni bnn bno bnp bnr bns bnt boa bob boe bog boi bon boo bop bor bos bot bpa bpb bpe bpg bpi bpn bpo bpp bpr bps bpt bra brb bre brg bri brn bro brp brr brs brt bsa bsb bse bsg bsi bsn bso bsp bsr bss bst bta btb bte btg bti btn bto btp btr bts btt eaa eab eae eag eai ean eao eap ear eas eat eba ebb ebe ebg ebi ebn ebo ebp ebr ebs ebt eea eeb eee eeg een eeo eep eer ees eet ega egb ege egg egi egn ego egp egr egs egt eia eib eie eig eii ein eio eip eir eis eit en- ena enb ene eng eni enn eno enp enr ens ent eo- eoa eob eoe eog eoi eon eoo eop eor eos eot ep- epa epb epe epg epi epn epo epp epr eps ept era erb ere erg eri ern ero erp err ers ert es- esa esb ese esg esi esn eso esp esr ess est eta etb ete etg eti etn eto etp etr ets ett g-p gaa gab gae gag gai gan gao gap gar gas gat gba gbe gbg gbi gbn gbo gbp gbr gbs gbt ge- gea geb gee geg gei gen geo gep ger ges get gga ggb ggg ggi ggn ggo ggp ggr ggs ggt gia gib gie gig gii gin gio gip gir gis git gna gnb gne gni gnn gno gnp gnr gns gnt goa gob goe gog goi gon goo gop gor gos got gpa gpb gpe gpg gpi gpn gpo gpp gpr gps gpt gra grb gre grg gri grn gro grp grr grs grt gsa gsb gse gsg gsi gsn gso gsp gsr gss gst gta gtb gte gtg gti gtn gto gtp gtr gts gtt ia- iaa iab iae iag iai ian iao iap iar ias iat iba ibb ibe ibg ibi ibn ibo ibp ibr ibs ibt ie- iea iee ieg iei ien iep ier ies iet iga igb ige igg igi ign igo igp igr igs igt iia iib iie iii iin iio iip iir iis iit in- ina inb ine ing ini inn ino inp inr ins int io- ioa iob ioe iog ioi ion ioo iop ior ios iot ipa ipb ipe ipg ipi ipn ipo ipp ipr ips ipt ir- ira irb ire irg iri irn iro irp irr irs irt is- isa isb ise isg isi isn iso isp isr iss ist ita itb ite itg iti itn ito itp its itt n-i naa nab nae nag nai nan nao nap nar nas nat nba nbb nbe nbg nbi nbn nbo nbp nbr nbs nbt ne- nea neb nee neg nei nen neo nep ner nes net nga ngb nge ngg ngi ngn ngo ngp ngs ngt nia nib nie nig nii nin nio nip nir nis nit nna nnb nne nng nni nnn nno nnp nns nnt no- noa nob noe nog noi non noo nop nor nos not npa npb npe npg npi npn npo npp npr nps npt nra nrb nre nrg nri nrn nro nrp nrr nrs nrt nsa nsb nse nsg nsi nsn nso nsp nsr nss nst nta ntb nte ntg nti ntn nto ntp ntr nts ntt o-i oaa oab oae oag oai oan oao oap oar oas oat ob- oba obb obe obg obi obn obo obp obr obs obt oea oeb oee oeg oei oen oeo oep oer oes oet oga oge ogg ogi ogn ogo ogp ogs ogt oia oib oie oii oin oio oip oir ois oit on- ona onb one ong oni onn ono onp onr ons ont oo- ooa oob oog ooi oon ooo oop oor oos oot op- opa opb ope opg opi opn opo opp opr ops opt or- ora orb ore org ori orn oro orp orr ors ort os- osa osb ose osg osi osn oso osp osr oss ost ot- ota otb ote otg oti otn oto otp otr ots ott p-p paa pab pae pag pai pan pao pap par pas pat pba pbb pbe pbg pbi pbn pbo pbp pbr pbs pbt pea peb pee peg pei pen peo pep per pes pet pga pgb pge pgg pgi pgn pgo pgp pgr pgs pgt pia pib pie pig pii pin pio pip pir pis pit pn- pna pnb pne png pni pnn pno pnp pnr pns pnt poa pob poe pog poi pon poo pop por pos pot ppa ppb ppe ppg ppi ppn ppo ppp ppr pps ppt pra prb pre prg pri prn pro prp prr prs prt ps- psa psb pse psg psi psn pso psp psr pss pst pt- pta ptb pte ptg pti ptn pto ptp ptr pts ptt ra- raa rab