a-a a-b a-i aaa aab aad aaf aai aan aao aar aas aau ab- aba abb abd abf abi abn abo abr abs abu ad- ada adb add adf adi adn ado adr ads adu af- afa afb afd aff afi afn afo afr afs afu ai- aia aib aid aif aii ain aio air ais aiu an- ana anb and anf ani ann ano anr ans anu aoa aob aod aof aoi aon aoo aor aos aou ar- ara arb ard arf ari arn aro arr ars aru as- asa asb asd asf asi asn aso asr ass asu au- aua aub aud auf aui aun auo aur aus b-u baa bab bad baf bai ban bao bar bas bau bba bbb bbd bbf bbi bbn bbo bbr bbs bbu bda bdb bdd bdf bdi bdo bdr bds bdu bfa bfb bfd bff bfi bfn bfo bfr bfs bfu bi- bia bib bid bif bii bin bio bir bis biu bna bnb bnd bnf bni bnn bno bnr bns bnu boa bob bod bof boi bon boo bor bos bou bra brb brd brf bri brn bro brr brs bru bsa bsb bsd bsf bsi bsn bso bsr bss bsu bua bub bud buf bui bun buo bur bus buu daa dab dad daf dai dan dao dar das dau dba dbb dbd dbf dbi dbn dbo dbr dbs dbu dda ddb ddd ddf ddi ddn ddo ddr dds ddu dfa dfb dfd dff dfi dfn dfo dfr dfs dfu di- dia dib did dif dii din dio dir dis diu dna dnb dnd dnf dni dnn dno dnr dns doa dob dod dof doi don doo dor dos dou dra drb drd dri drn dro drr drs dru dsa dsb dsd dsf dsi dsn dso dsr dss dsu dua dub dud duf dui dun duo dur dus faa fab fad faf fai fan fao far fas fau fba fbb fbd fbf fbi fbn fbo fbr fbs fbu fda fdb fdd fdf fdi fdn fdo fdr fds fdu ffa ffd fff ffi ffn ffo ffr ffs ffu fia fib fid fif fii fin fir fis fiu fna fnb fnd fnf fni fnn fnr fns fnu foa fob fof foi fon foo for fos fou fra frb frd frf fri frn fro frr frs fru fsa fsb fsd fsf fsi fsn fso fsr fss fsu fua fub fud fuf fui fun fuo fur fus fuu i-d i-f ia- iaa iab iad iaf iai ian iao iar ias iau iba ibb ibd ibf ibi ibn ibo ibr ibs ibu ida idb idd idf idi idn ido idr ids idu ifa ifb ifd iff ifi ifn ifo ifr ifs ifu iia iib iid iif iii iin iio iir iis iiu in- ina inb ind inf ini inn ino inr ins inu io- ioa iob iod iof ioi ion ioo ior ios iou ir- ira irb ird irf iri irn iro irr irs iru is- isa isb isd isf isi isn iso isr iss isu iu- iua iub iud iui iur ius n-i naa nab nad naf nai nan nao nar nas nau nba nbb nbd nbf nbi nbn nbo nbr nbs nbu nda ndb ndd ndf ndi ndn ndo ndr nds ndu nfa nfb nfd nff nfi nfn nfo nfr nfs nfu nia nib nid nif nii nin nio nir nis niu nna nnb nnf nni nnn nno nns nnu no- noa nob nod nof noi non noo nor nos nou nra nrb nrd nrf nri nrn nro nrr nrs nru nsa nsb nsd nsf nsi nsn nso nsr nss nsu nua nub nud nui nun nuo nur nus nuu o-i oaa oab oad oaf oai oan oao oar oas oau ob- oba obb obd obf obi obn obo obr obs obu oda odb odd odf odi odn odo odr ods odu of- ofa ofb ofd off ofi ofn ofo ofr ofs ofu oia oib oid oif oii oin oio oir ois oiu on- ona onb ond onf oni onn ono onr ons onu oo- ooa oob ood oof ooi oon ooo oor oos or- ora orb ord orf ori orn oro orr ors oru os- osa osb osd osf osi osn oso osr oss osu ou- oua oud ouf oui oun ouo our ous ra- raa rab rad raf rai ran rao rar ras rau rba rbb rbd rbf rbi rbn rbo rbr rbs rbu rda rdb rdd rdf rdi rdn rdo rdr rds rdu rfa rfb rfd rff rfi rfn rfo rfr rfs rfu ria rib rid rif rii rin rio rir ris rna rnb rnd rni rnn rno rnr rns rnu roa rob rod rof roi ron roo ror ros rou rra rrb rrd rrf rri rrn rrr rrs rru rsa rsb rsd rsf rsi rsn rso rsr rss rsu rua rub rud ruf rui run ruo rur rus ruu saa sab sad saf sai san sao sar sas sau sba sbb sbd sbf sbi sbn sbo sbr sbs sbu sda sdb sdd sdf sdi sdn sdo sdr sds sdu sfa sfb sfd sff sfi sfn sfo sfr sfs sfu sia sib sid sif sii sin sio sir sis siu sna snb snd snf sni snn sno snr sns snu soa sob sod sof soi son soo sor sos sou sr- sra srb srd srf sri srn sro srr srs ss- ssa ssb ssd ssf ssi ssn sso ssr sss ssu sua sub sud suf sui sun suo sur sus suu ua- uaa uab uad uaf uai uan uao uar uas uau uba ubb ubf ubi ubn ubo ubr ubs ubu uda udb udd udf udi udn udo udr uds udu ufa ufd uff ufi ufn ufo ufr ufs ufu uia uib uid uif uii uin uio uir uis uiu un- una unb und unf uni unn uno unr uns unu uoa uob uod uon uoo uor uos ur- ura urb urd urf uri urn uro urr urs uru usa usb usd usf usi usn uso usr uss usu