a-a a-b aaa aab aad aae aah aao aap ab- aba abb abd abe abh abo abp ad- ada adb add ade adh ado adp aea aeb aed aee aeh aeo aep aha ahb ahd ahe ahh aho ahp aoa aob aod aoe aoh aoo aop ap- apa apb apd ape aph apo app b-p baa bab bad bae bah bao bap bba bbb bbd bbe bbh bbo bbp bda bdb bdd bde bdh bdo bdp be- bea beb bed bee beh beo bep bha bhb bhd bhe bhh bho bhp boa bob bod boe boh boo bop bpa bpb bpd bpe bph bpo bpp daa dab dad dae dah dao dap dba dbb dbd dbe dbh dbo dbp dda ddb ddd dde ddh ddo ddp de- dea deb ded dee deh deo dep dh- dha dhb dhd dhe dhh dho dhp doa dob dod doe doh doo dop dpa dpb dpd dpe dph dpo dpp eaa eab ead eae eah eao eap eba ebb ebd ebe ebh ebo ebp ed- eda edb edd ede edh edo edp eea eeb eed eee eeo eep eha ehb ehd ehe ehh eho ehp eo- eoa eob eod eoe eoh eoo eop ep- epa epb epd epe eph epo epp haa hab had hae hah hao hap hba hbb hbd hbe hbh hbo hbp hda hdb hdd hde hdh hdo hdp he- hea heb hed hee heh heo hep hha hhb hhd hhe hhh hho hhp hoa hob hod hoe hoh hoo hop hpa hpb hpd hpe hph hpo hpp oaa oab oad oae oah oao oap ob- oba obb obd obe obh obo obp oda odb odd ode odh odo odp oea oeb oed oee oeh oeo oep oha ohd ohe ohh oho ohp oo- ooa oob ood ooh ooo oop op- opa opb opd ope oph opo opp p-p paa pab pad pae pah pao pap pba pbb pbd pbe pbo pbp pda pdb pdd pde pdh pdo pdp pea peb ped pee peh peo pep pha phb phd phe pho php poa pob pod poe poh poo pop ppa ppb ppd ppe pph ppo ppp