a-a a-b a-i aaa aab aae aaf aag aai aan aao aap aas ab- aba abb abe abf abg abi abn abo abp abs aea aeb aee aef aeg aei aen aeo aep aes af- afa afb afe aff afg afi afn afo afp afs ag- aga agb age agf agg agi agn ago agp ags ai- aia aib aie aif aig aii ain aio aip ais an- ana anb ane anf ang ani ann ano anp ans aoa aob aoe aof aog aoi aon aoo aop aos ap- apa apb ape apf apg api apn apo app aps as- asa asb ase asf asg asi asn aso asp ass b-p baa bab bae baf bag bai ban bao bap bas bba bbb bbe bbf bbg bbi bbn bbo bbp bbs be- bea beb bee bef beg bei ben beo bep bes bfa bfb bfe bff bfg bfi bfn bfo bfp bfs bga bgb bge bgf bgg bgi bgn bgo bgp bgs bi- bia bib bie bif big bii bin bio bip bis bna bnb bne bnf bng bni bnn bno bnp bns boa bob boe bof bog boi bon boo bop bos bpa bpb bpe bpf bpg bpi bpn bpo bpp bps bsa bsb bse bsf bsg bsi bsn bso bsp bss eaa eab eae eaf eag eai ean eao eap eas eba ebb ebe ebf ebg ebi ebn ebo ebp ebs eea eeb eee eef eeg een eeo eep ees ef- efa efb efe eff efg efi efo efp efs ega egb ege egf egg egi egn ego egp egs eia eib eie eif eig eii ein eio eip eis en- ena enb ene enf eng eni enn eno enp ens eo- eoa eob eoe eof eog eoi eon eoo eop eos ep- epa epb epe epf epg epi epn epo epp eps es- esa esb ese esf esg esi esn eso esp ess faa fab fae faf fag fai fan fao fap fas fba fbb fbe fbf fbg fbi fbn fbo fbp fbs fea feb fee fef feg fei fen feo fep fes ffa ffe fff ffg ffi ffn ffo ffp ffs fga fgb fge fgf fgg fgi fgn fgp fgs fia fib fie fif fig fii fin fip fis fna fnb fne fnf fng fni fnn fnp fns foa fob foe fof fog foi fon foo fop fos fpa fpb fpe fpg fpi fpn fpo fpp fps fsa fsb fse fsf fsg fsi fsn fso fsp fss g-p gaa gab gae gaf gag gai gan gao gap gas gba gbe gbf gbg gbi gbn gbo gbp gbs ge- gea geb gee gef geg gei gen geo gep ges gfa gfb gfe gff gfi gfo gfp gfs gga ggb ggg ggi ggn ggo ggp ggs gia gib gie gif gig gii gin gio gip gis gna gnb gne gnf gni gnn gno gnp gns goa gob goe gof gog goi gon goo gop gos gpa gpb gpe gpf gpg gpi gpn gpo gpp gps gsa gsb gse gsf gsg gsi gsn gso gsp gss i-f ia- iaa iab iae iaf iag iai ian iao iap ias iba ibb ibe ibf ibg ibi ibn ibo ibp ibs ie- iea iee ief ieg iei ien iep ies ifa ifb ife iff ifg ifi ifn ifo ifp ifs iga igb ige igf igg igi ign igo igp igs iia iib iie iif iii iin iio iip iis in- ina inb ine inf ing ini inn ino inp ins io- ioa iob ioe iof iog ioi ion ioo iop ios ipa ipb ipe ipf ipg ipi ipn ipo ipp ips is- isa isb ise isf isg isi isn iso isp iss n-i naa nab nae naf nag nai nan nao nap nas nba nbb nbe nbf nbg nbi nbn nbo nbp nbs ne- nea neb nee nef neg nei nen neo nep nes nfa nfb nfe nff nfi nfn nfo nfp nfs nga ngb nge ngf ngg ngi ngn ngo ngp ngs nia nib nie nif nig nii nin nio nip nis nna nnb nne nnf nng nni nnn nno nnp nns no- noa nob noe nof nog noi non noo nop nos npa npb npe npf npg npi npn npo npp nps nsa nsb nse nsf nsg nsi nsn nso nsp nss o-i oaa oab oae oaf oag oai oan oao oap oas ob- oba obb obe obf obg obi obn obo obp obs oea oeb oee oef oeg oei oen oeo oep oes of- ofa ofb ofe off ofg ofi ofn ofo ofp ofs oga oge ogf ogg ogi ogn ogo ogp ogs oia oib oie oif oii oin oio oip ois on- ona onb one onf ong oni onn ono onp ons oo- ooa oob oof oog ooi oon ooo oop oos op- opa opb ope opf opg opi opn opo opp ops os- osa osb ose osf osg osi osn oso osp oss p-p paa pab pae paf pag pai pan pao pap pas pba pbb pbe pbf pbg pbi pbn pbo pbp pbs pea peb pee pef peg pei pen peo pep pes pfa pfb pfe pff pfg pfi pfn pfo pfp pfs pga pgb pge pgf pgg pgi pgn pgo pgp pgs pia pib pie pif pig pii pin pio pip pis pn- pna pnb pne pnf png pni pnn pno pnp pns poa pob poe pof pog poi pon poo pop pos ppa ppb ppe ppf ppg ppi ppn ppo ppp pps ps- psa psb pse psf psg psi psn pso psp pss saa sab sae saf sag sai san sao sap sas sba sbb sbe sbf sbg sbi sbn sbo sbp sbs se- sea seb see sef seg sei sen seo sep ses sfa sfb sfe sff sfg sfi sfn sfo sfp sfs sga sgb sge sgf sgg sgi sgn sgo sgp sgs sia sib sie sif sig sii sin sio sip sis sna snb sne snf sng sni snn sno snp sns soa sob soe sof sog soi son soo sop sos