a-a a-b a-i aaa aab aad aag aai aan aao aar aas ab- aba abb abd abg abi abn abo abr abs ad- ada adb add adg adi adn ado adr ads ag- aga agb agd agg agi agn ago agr ags ai- aia aib aid aig aii ain aio air ais an- ana anb and ang ani ann ano anr ans aoa aob aod aog aoi aon aoo aor aos ar- ara arb ard arg ari arn aro arr ars as- asa asb asd asg asi asn aso asr ass baa bab bad bag bai ban bao bar bas bba bbb bbd bbg bbi bbn bbo bbr bbs bda bdb bdd bdg bdi bdo bdr bds bga bgb bgd bgg bgi bgn bgo bgr bgs bi- bia bib bid big bii bin bio bir bis bna bnb bnd bng bni bnn bno bnr bns boa bob bod bog boi bon boo bor bos bra brb brd brg bri brn bro brr brs bsa bsb bsd bsg bsi bsn bso bsr bss daa dab dad dag dai dan dao dar das dba dbb dbd dbg dbi dbn dbo dbr dbs dda ddb ddd ddg ddi ddn ddo ddr dds dga dgd dgg dgi dgn dgr dgs di- dia dib did dig dii din dio dir dis dna dnb dnd dng dni dnn dno dnr dns doa dob dod dog doi don doo dor dos dra drb drd drg dri drn dro drr drs dsa dsb dsd dsg dsi dsn dso dsr dss g-d gaa gab gad gag gai gan gao gar gas gba gbd gbg gbi gbn gbo gbr gbs gda gdb gdd gdi gdn gdo gdr gds gga ggb ggd ggg ggi ggn ggo ggr ggs gia gib gid gig gii gin gio gir gis gna gnb gnd gni gnn gno gnr gns goa gob god gog goi gon goo gor gos gra grb grd grg gri grn gro grr grs gsa gsb gsd gsg gsi gsn gso gsr gss i-d ia- iaa iab iad iag iai ian iao iar ias iba ibb ibd ibg ibi ibn ibo ibr ibs ida idb idd idg idi idn ido idr ids iga igb igd igg igi ign igo igr igs iia iib iid iii iin iio iir iis in- ina inb ind ing ini inn ino inr ins io- ioa iob iod iog ioi ion ioo ior ios ir- ira irb ird irg iri irn iro irr irs is- isa isb isd isg isi isn iso isr iss n-i naa nab nad nag nai nan nao nar nas nba nbb nbd nbg nbi nbn nbo nbr nbs nda ndb ndd ndg ndi ndn ndo ndr nds nga ngb ngd ngg ngi ngn ngo ngs nia nib nid nig nii nin nio nir nis nna nnb nng nni nnn nno nns no- noa nob nod nog noi non noo nor nos nra nrb nrd nrg nri nrn nro nrr nrs nsa nsb nsd nsg nsi nsn nso nsr nss o-i oaa oab oad oag oai oan oao oar oas ob- oba obb obd obg obi obn obo obr obs oda odb odd odg odi odn odo odr ods oga ogd ogg ogi ogn ogo ogs oia oib oid oii oin oio oir ois on- ona onb ond ong oni onn ono onr ons oo- ooa oob ood oog ooi oon ooo oor oos or- ora orb ord org ori orn oro orr ors os- osa osb osd osg osi osn oso osr oss ra- raa rab rad rag rai ran rao rar ras rba rbb rbd rbg rbi rbn rbo rbr rbs rda rdb rdd rdg rdi rdn rdo rdr rds rga rgb rgd rgg rgi rgn rgo rgr rgs ria rib rid rig rii rin rio rir ris rna rnb rnd rng rni rnn rno rnr rns roa rob rod rog roi ron roo ror ros rra rrb rrd rrg rri rrn rrr rrs rsa rsb rsd rsg rsi rsn rso rsr rss saa sab sad sag sai san sao sar sas sba sbb sbd sbg sbi sbn sbo sbr sbs sda sdb sdd sdg sdi sdn sdo sdr sds sga sgb sgd sgg sgi sgn sgo sgr sgs sia sib sid sig sii sin sio sir sis sna snb snd sng sni snn sno snr sns soa sob sod sog soi son soo sor sos sr- sra srb srd srg sri srn sro srr srs ss- ssa ssb ssd ssg ssi ssn sso ssr sss