a-a a-b aaa aab aad aah aao aap ab- aba abb abd abh abo abp ad- ada adb add adh ado adp aha ahb ahd ahh aho ahp aoa aob aod aoh aoo aop ap- apa apb apd aph apo app b-p baa bab bad bah bao bap bba bbb bbd bbh bbo bbp bda bdb bdd bdh bdo bdp bha bhb bhd bhh bho bhp boa bob bod boh boo bop bpa bpb bpd bph bpo bpp daa dab dad dah dao dap dba dbb dbd dbh dbo dbp dda ddb ddd ddh ddo ddp dh- dha dhb dhd dhh dho dhp doa dob dod doh doo dop dpa dpb dpd dph dpo dpp haa hab had hah hao hap hba hbb hbd hbh hbo hbp hda hdb hdd hdh hdo hdp hha hhb hhd hhh hho hhp hoa hob hod hoh hoo hop hpa hpb hpd hph hpo hpp oaa oab oad oah oao oap ob- oba obb obd obh obo obp oda odb odd odh odo odp oha ohd ohh oho ohp oo- ooa oob ood ooh ooo oop op- opa opb opd oph opo opp p-p paa pab pad pah pao pap pba pbb pbd pbo pbp pda pdb pdd pdh pdo pdp pha phb phd pho php poa pob pod poh poo pop ppa ppb ppd pph ppo ppp