a-a a-b a-i aaa aab aah aai aao aap aar aas ab- aba abb abh abi abo abp abr abs aha ahb ahh ahi aho ahp ahr ahs ai- aia aib aih aii aio aip air ais aoa aob aoh aoi aoo aop aor aos ap- apa apb aph api apo app apr aps ar- ara arb arh ari aro arp arr ars as- asa asb ash asi aso asp asr ass b-p baa bab bah bai bao bap bar bas bba bbb bbh bbi bbo bbp bbr bbs bha bhb bhh bhi bho bhp bhr bhs bi- bia bib bih bii bio bip bir bis boa bob boh boi boo bop bor bos bpa bpb bph bpi bpo bpp bpr bps bra brb brh bri bro brp brr brs bsa bsb bsh bsi bso bsp bsr bss h-i haa hab hah hai hao hap har has hba hbb hbh hbi hbo hbp hbr hbs hha hhb hhh hhi hho hhp hhr hhs hia hib hih hii hio hip hir his hoa hob hoh hoi hoo hop hor hos hpa hpb hph hpi hpo hpp hpr hps hr- hra hrb hrh hri hro hrp hrr hrs hsa hsb hsh hsi hsp hsr hss ia- iaa iab iah iai iao iap iar ias iba ibb ibh ibi ibo ibp ibr ibs iha ihb ihh ihi iho ihp ihr ihs iia iib iih iii iio iip iir iis io- ioa iob ioh ioi ioo iop ior ios ipa ipb ipi ipo ipp ipr ips ir- ira irb iri iro irp irr irs is- isa isb ish isi iso isp isr iss o-i oaa oab oah oai oao oap oar oas ob- oba obb obh obi obo obp obr obs oha ohh ohi oho ohp ohr ohs oia oib oii oio oip oir ois oo- ooa oob ooh ooi ooo oop oor oos op- opa opb oph opi opo opp opr ops or- ora orb orh ori oro orp orr ors os- osa osb osh osi oso osp osr oss p-p paa pab pah pai pao pap par pas pba pbb pbi pbo pbp pbr pbs pha phb phi pho php phr phs pia pib pih pii pio pip pir pis poa pob poh poi poo pop por pos ppa ppb pph ppi ppo ppp ppr pps pra prb prh pri pro prp prr prs ps- psa psb psh psi pso psp psr pss ra- raa rab rah rai rao rap rar ras rba rbb rbh rbi rbo rbp rbr rbs rh- rha rhb rhh rhi rho rhp rhr rhs ria rib rih rii rio rip rir ris roa rob roh roi roo rop ror ros rpa rpb rph rpi rpo rpp rpr rps rra rrb rrh rri rrp rrr rrs rsa rsb rsh rsi rso rsp rsr rss saa sab sah sai sao sap sar sas sba sbb sbh sbi sbo sbp sbr sbs sh- sha shb shh shi sho shp shr shs sia sib sih sii sio sip sir sis soa sob soh soi soo sop sor sos spa spb sph spi spo spp spr sps sr- sra srb srh sri sro srp srr srs ss- ssa ssb ssh ssi sso ssp ssr sss