-er a-a a-b a-i aaa aab aae aaf aag aai aan aao aap aar ab- aba abb abe abf abg abi abn abo abp abr aea aeb aee aef aeg aei aen aeo aep aer af- afa afb afe aff afg afi afn afo afp afr ag- aga agb age agf agg agi agn ago agp agr ai- aia aib aie aif aig aii ain aio aip air an- ana anb ane anf ang ani ann ano anp anr aoa aob aoe aof aog aoi aon aoo aop aor ap- apa apb ape apf apg api apn apo app apr ar- ara arb are arf arg ari arn aro arp arr b-p baa bab bae baf bag bai ban bao bap bar bba bbb bbe bbf bbg bbi bbn bbo bbp bbr be- bea beb bee bef beg bei ben beo bep ber bfa bfb bfe bff bfg bfi bfn bfo bfp bfr bga bgb bge bgf bgg bgi bgn bgo bgp bgr bi- bia bib bie bif big bii bin bio bip bir bna bnb bne bnf bng bni bnn bno bnp bnr boa bob boe bof bog boi bon boo bop bor bpa bpb bpe bpf bpg bpi bpn bpo bpp bpr bra brb bre brf brg bri brn bro brp brr eaa eab eae eaf eag eai ean eao eap ear eba ebb ebe ebf ebg ebi ebn ebo ebp ebr eea eeb eee eef eeg een eeo eep eer ef- efa efb efe eff efg efi efo efp efr ega egb ege egf egg egi egn ego egp egr eia eib eie eif eig eii ein eio eip eir en- ena enb ene enf eng eni enn eno enp enr eo- eoa eob eoe eof eog eoi eon eoo eop eor ep- epa epb epe epf epg epi epn epo epp epr era erb ere erf erg eri ern ero erp err faa fab fae faf fag fai fan fao fap far fba fbb fbe fbf fbg fbi fbn fbo fbp fbr fea feb fee fef feg fei fen feo fep fer ffa ffe fff ffg ffi ffn ffo ffp ffr fga fgb fge fgf fgg fgi fgn fgp fgr fia fib fie fif fig fii fin fip fir fna fnb fne fnf fng fni fnn fnp fnr foa fob foe fof fog foi fon foo fop for fpa fpb fpe fpg fpi fpn fpo fpp fpr fra frb fre frf frg fri frn fro frp frr g-p gaa gab gae gaf gag gai gan gao gap gar gba gbe gbf gbg gbi gbn gbo gbp gbr ge- gea geb gee gef geg gei gen geo gep ger gfa gfb gfe gff gfi gfo gfp gfr gga ggb ggg ggi ggn ggo ggp ggr gia gib gie gif gig gii gin gio gip gir gna gnb gne gnf gni gnn gno gnp gnr goa gob goe gof gog goi gon goo gop gor gpa gpb gpe gpf gpg gpi gpn gpo gpp gpr gra grb gre grf grg gri grn gro grp grr i-f ia- iaa iab iae iaf iag iai ian iao iap iar iba ibb ibe ibf ibg ibi ibn ibo ibp ibr ie- iea iee ief ieg iei ien iep ier ifa ifb ife iff ifg ifi ifn ifo ifp ifr iga igb ige igf igg igi ign igo igp igr iia iib iie iif iii iin iio iip iir in- ina inb ine inf ing ini inn ino inp inr io- ioa iob ioe iof iog ioi ion ioo iop ior ipa ipb ipe ipf ipg ipi ipn ipo ipp ipr ir- ira irb ire irf irg iri irn iro irp irr n-i naa nab nae naf nag nai nan nao nap nar nba nbb nbe nbf nbg nbi nbn nbo nbp nbr ne- nea neb nee nef neg nei nen neo nep ner nfa nfb nfe nff nfi nfn nfo nfp nfr nga ngb nge ngf ngg ngi ngn ngo ngp nia nib nie nif nig nii nin nio nip nir nna nnb nne nnf nng nni nnn nno nnp no- noa nob noe nof nog noi non noo nop nor npa npb npe npf npg npi npn npo npp npr nra nrb nre nrf nrg nri nrn nro nrp nrr o-i oaa oab oae oaf oag oai oan oao oap oar ob- oba obb obe obf obg obi obn obo obp obr oea oeb oee oef oeg oei oen oeo oep oer of- ofa ofb ofe off ofg ofi ofn ofo ofp ofr oga oge ogf ogg ogi ogn ogo ogp oia oib oie oif oii oin oio oip oir on- ona onb one onf ong oni onn ono onp onr oo- ooa oob oof oog ooi oon ooo oop oor op- opa opb ope opf opg opi opn opo opp opr or- ora orb ore orf org ori orn oro orp orr p-p paa pab pae paf pag pai pan pao pap par pba pbb pbe pbf pbg pbi pbn pbo pbp pbr pea peb pee pef peg pei pen peo pep per pfa pfb pfe pff pfg pfi pfn pfo pfp pfr pga pgb pge pgf pgg pgi pgn pgo pgp pgr pia pib pie pif pig pii pin pio pip pir pn- pna pnb pne pnf png pni pnn pno pnp pnr poa pob poe pof pog poi pon poo pop por ppa ppb ppe ppf ppg ppi ppn ppo ppp ppr pra prb pre prf prg pri prn pro prp prr ra- raa rab rae raf rag rai ran rao rap rar rba rbb rbe rbf rbg rbi rbn rbo rbp rbr re- rea reb ree ref reg rei ren reo rep rer rfa rfb rfe rff rfg rfi rfn rfo rfp rfr rga rgb rge rgf rgg rgi rgn rgo rgp rgr ria rib rie rif rig rii rin rio rip rir rna rnb rng rni rnn rno rnp rnr roa rob roe rof rog roi ron roo rop ror rpa rpb rpe rpf rpg