a-a a-b aaa aab aad aah aao aap aar ab- aba abb abd abh abo abp abr ad- ada adb add adh ado adp adr aha ahb ahd ahh aho ahp ahr aoa aob aod aoh aoo aop aor ap- apa apb apd aph apo app apr ar- ara arb ard arh aro arp arr b-p baa bab bad bah bao bap bar bba bbb bbd bbh bbo bbp bbr bda bdb bdd bdh bdo bdp bdr bha bhb bhd bhh bho bhp bhr boa bob bod boh boo bop bor bpa bpb bpd bph bpo bpp bpr bra brb brd brh bro brp brr daa dab dad dah dao dap dar dba dbb dbd dbh dbo dbp dbr dda ddb ddd ddh ddo ddp ddr dh- dha dhb dhd dhh dho dhp dhr doa dob dod doh doo dop dor dpa dpb dpd dph dpo dpp dpr dra drb drd dro drp drr haa hab had hah hao hap har hba hbb hbd hbh hbo hbp hbr hda hdb hdd hdh hdo hdp hdr hha hhb hhd hhh hho hhp hhr hoa hob hod hoh hoo hop hor hpa hpb hpd hph hpo hpp hpr hr- hra hrb hrd hrh hro hrp hrr oaa oab oad oah oao oap oar ob- oba obb obd obh obo obp obr oda odb odd odh odo odp odr oha ohd ohh oho ohp ohr oo- ooa oob ood ooh ooo oop oor op- opa opb opd oph opo opp opr or- ora orb ord orh oro orp orr p-p paa pab pad pah pao pap par pba pbb pbd pbo pbp pbr pda pdb pdd pdh pdo pdp pdr pha phb phd pho php phr poa pob pod poh poo pop por ppa ppb ppd pph ppo ppp ppr pra prb prd prh pro prp prr ra- raa rab rad rah rao rap rar rba rbb rbd rbh rbo rbp rbr rda rdb rdd rdh rdo rdp rdr rh- rha rhb rhd rhh rho rhp rhr roa rob rod roh roo rop ror rpa rpb rpd rph rpo rpp rpr rra rrb rrd rrh rrp rrr