a-a a-b aaa aab aad aah aao aap aar aas ab- aba abb abd abh abo abp abr abs ad- ada adb add adh ado adp adr ads aha ahb ahd ahh aho ahp ahr ahs aoa aob aod aoh aoo aop aor aos ap- apa apb apd aph apo app apr aps ar- ara arb ard arh aro arp arr ars as- asa asb asd ash aso asp asr ass b-p baa bab bad bah bao bap bar bas bba bbb bbd bbh bbo bbp bbr bbs bda bdb bdd bdh bdo bdp bdr bds bha bhb bhd bhh bho bhp bhr bhs boa bob bod boh boo bop bor bos bpa bpb bpd bph bpo bpp bpr bps bra brb brd brh bro brp brr brs bsa bsb bsd bsh bso bsp bsr bss daa dab dad dah dao dap dar das dba dbb dbd dbh dbo dbp dbr dbs dda ddb ddd ddh ddo ddp ddr dds dh- dha dhb dhd dhh dho dhp dhr dhs doa dob dod doh doo dop dor dos dpa dpb dpd dph dpo dpp dpr dps dra drb drd dro drp drr drs dsa dsb dsd dsh dso dsp dsr dss haa hab had hah hao hap har has hba hbb hbd hbh hbo hbp hbr hbs hda hdb hdd hdh hdo hdp hdr hds hha hhb hhd hhh hho hhp hhr hhs hoa hob hod hoh hoo hop hor hos hpa hpb hpd hph hpo hpp hpr hps hr- hra hrb hrd hrh hro hrp hrr hrs hsa hsb hsd hsh hsp hsr hss oaa oab oad oah oao oap oar oas ob- oba obb obd obh obo obp obr obs oda odb odd odh odo odp odr ods oha ohd ohh oho ohp ohr ohs oo- ooa oob ood ooh ooo oop oor oos op- opa opb opd oph opo opp opr ops or- ora orb ord orh oro orp orr ors os- osa osb osd osh oso osp osr oss p-p paa pab pad pah pao pap par pas pba pbb pbd pbo pbp pbr pbs pda pdb pdd pdh pdo pdp pdr pds pha phb phd pho php phr phs poa pob pod poh poo pop por pos ppa ppb ppd pph ppo ppp ppr pps pra prb prd prh pro prp prr prs ps- psa psb psd psh pso psp psr pss ra- raa rab rad rah rao rap rar ras rba rbb rbd rbh rbo rbp rbr rbs rda rdb rdd rdh rdo rdp rdr rds rh- rha rhb rhd rhh rho rhp rhr rhs roa rob rod roh roo rop ror ros rpa rpb rpd rph rpo rpp rpr rps rra rrb rrd rrh rrp rrr rrs rsa rsb rsd rsh rso rsp rsr rss saa sab sad sah sao sap sar sas sba sbb sbd sbh sbo sbp sbr sbs sda sdb sdd sdh sdo sdp sdr sds sh- sha shb shd shh sho shp shr shs soa sob sod soh soo sop sor sos spa spb spd sph spo spp spr sps sr- sra srb srd srh sro srp srr srs ss- ssa ssb ssd ssh sso ssp ssr sss