a-a a-b a-i aaa aab aag aah aai aao aap aar aas ab- aba abb abg abh abi abo abp abr abs ag- aga agb agg agh agi ago agp agr ags aha ahb ahg ahh ahi aho ahp ahr ahs ai- aia aib aig aih aii aio aip air ais aoa aob aog aoh aoi aoo aop aor aos ap- apa apb apg aph api apo app apr aps ar- ara arb arg arh ari aro arp arr ars as- asa asb asg ash asi aso asp asr ass b-p baa bab bag bah bai bao bap bar bas bba bbb bbg bbh bbi bbo bbp bbr bbs bga bgb bgg bgh bgi bgo bgp bgr bgs bha bhb bhg bhh bhi bho bhp bhr bhs bi- bia bib big bih bii bio bip bir bis boa bob bog boh boi boo bop bor bos bpa bpb bpg bph bpi bpo bpp bpr bps bra brb brg brh bri bro brp brr brs bsa bsb bsg bsh bsi bso bsp bsr bss g-p gaa gab gag gah gai gao gap gar gas gba gbg gbh gbi gbo gbp gbr gbs gga ggb ggg ggh ggi ggo ggp ggr ggs gha ghb ghg ghh ghi gho ghp ghr ghs gia gib gig gih gii gio gip gir gis goa gob gog goh goi goo gop gor gos gpa gpb gpg gph gpi gpo gpp gpr gps gra grb grg grh gri gro grp grr grs gsa gsb gsg gsi gso gsp gsr gss h-i haa hab hag hah hai hao hap har has hba hbb hbg hbh hbi hbo hbp hbr hbs hga hgb hgg hgh hgi hgo hgp hgr hgs hha hhb hhg hhh hhi hho hhp hhr hhs hia hib hig hih hii hio hip hir his hoa hob hog hoh hoi hoo hop hor hos hpa hpb hpg hph hpi hpo hpp hpr hps hr- hra hrb hrg hrh hri hro hrp hrr hrs hsa hsb hsg hsh hsi hsp hsr hss ia- iaa iab iag iah iai iao iap iar ias iba ibb ibg ibh ibi ibo ibp ibr ibs iga igb igg igh igi igo igp igr igs iha ihb ihg ihh ihi iho ihp ihr ihs iia iib iih iii iio iip iir iis io- ioa iob iog ioh ioi ioo iop ior ios ipa ipb ipg ipi ipo ipp ipr ips ir- ira irb irg iri iro irp irr irs is- isa isb isg ish isi iso isp isr iss o-i oaa oab oag oah oai oao oap oar oas ob- oba obb obg obh obi obo obp obr obs oga ogg ogh ogi ogo ogp ogs oha ohg ohh ohi oho ohp ohr ohs oia oib oii oio oip oir ois oo- ooa oob oog ooh ooi ooo oop oor oos op- opa opb opg oph opi opo opp opr ops or- ora orb org orh ori oro orp orr ors os- osa osb osg osh osi oso osp osr oss p-p paa pab pag pah pai pao pap par pas pba pbb pbg pbi pbo pbp pbr pbs pga pgb pgg pgh pgi pgo pgp pgr pgs pha phb phg phi pho php phr phs pia pib pig pih pii pio pip pir pis poa pob pog poh poi poo pop por pos ppa ppb ppg pph ppi ppo ppp ppr pps pra prb prg prh pri pro prp prr prs ps- psa psb psg psh psi pso psp psr pss ra- raa rab rag rah rai rao rap rar ras rba rbb rbg rbh rbi rbo rbp rbr rbs rga rgb rgg rgh rgi rgo rgp rgr rgs rh- rha rhb rhg rhh rhi rho rhp rhr rhs ria rib rig rih rii rio rip rir ris roa rob rog roh roi roo rop ror ros rpa rpb rpg rph rpi rpo rpp rpr rps rra rrb rrg rrh rri rrp rrr rrs rsa rsb rsg rsh rsi rso rsp rsr rss saa sab sag sah sai sao sap sar sas sba sbb sbg sbh sbi sbo sbp sbr sbs sga sgb sgg sgh sgi sgo sgp sgr sgs sh- sha shb shg shh shi sho shp shr shs sia sib sig sih sii sio sip sir sis soa sob sog soh soi soo sop sor sos spa spb spg sph spi spo spp spr sps sr- sra srb srg srh sri sro srp srr srs ss- ssa ssb ssg ssh ssi sso ssp ssr sss