a-a a-b aaa aab aad aak aan aap ab- aba abb abd abk abn abp ad- ada adb add adk adn adp aka akb akd akk akn akp an- ana anb and ank ann anp ap- apa apb apd apk apn app b-p baa bab bad bak ban bap bba bbb bbd bbk bbn bbp bda bdb bdd bdk bdp bka bkb bkk bkn bkp bna bnb bnd bnk bnn bnp bpa bpb bpd bpn bpp daa dab dad dak dan dap dba dbb dbd dbk dbn dbp dda ddb ddd ddk ddn ddp dka dkb dkk dkp dna dnb dnd dnk dnn dnp dpa dpb dpd dpk dpn dpp ka- kaa kab kad kak kan kap kba kbb kbd kbk kbn kbp kda kdb kdk kdp kkb kkk kkn kkp kn- kna knd knk knn knp kpa kpd kpk kpn kpp naa nab nad nak nan nap nba nbb nbd nbk nbn nbp nda ndb ndd ndk ndn ndp nka nkk nkn nkp nna nnb nnk nnn nnp npa npb npd npn npp p-p paa pab pad pak pan pap pba pbb pbd pbk pbn pbp pda pdb pdd pdk pdn pdp pka pkb pkd pkn pkp pn- pna pnb pnd pnk pnn pnp ppa ppb ppd ppk ppn ppp