a-a a-b aaa aab aad aah aap ab- aba abb abd abh abp ad- ada adb add adh adp aha ahb ahd ahh ahp ap- apa apb apd aph app b-p baa bab bad bah bap bba bbb bbd bbh bbp bda bdb bdd bdh bdp bha bhb bhd bhh bhp bpa bpb bpd bph bpp daa dab dad dah dap dba dbb dbd dbh dbp dda ddb ddd ddh ddp dh- dha dhb dhd dhh dhp dpa dpb dpd dph dpp haa hab had hah hap hba hbb hbd hbh hbp hda hdb hdd hdh hdp hha hhb hhd hhh hhp hpa hpb hpd hph hpp p-p paa pab pad pah pap pba pbb pbd pbp pda pdb pdd pdh pdp pha phb phd php ppa ppb ppd pph ppp