a-a a-b aaa aab aad aak aan aap aar ab- aba abb abd abk abn abp abr ad- ada adb add adk adn adp adr aka akb akd akk akn akp akr an- ana anb and ank ann anp anr ap- apa apb apd apk apn app apr ar- ara arb ard ark arn arp arr b-p baa bab bad bak ban bap bar bba bbb bbd bbk bbn bbp bbr bda bdb bdd bdk bdp bdr bka bkb bkk bkn bkp bkr bna bnb bnd bnk bnn bnp bnr bpa bpb bpd bpn bpp bpr bra brb brd brk brn brp brr daa dab dad dak dan dap dar dba dbb dbd dbk dbn dbp dbr dda ddb ddd ddk ddn ddp ddr dka dkb dkk dkp dkr dna dnb dnd dnk dnn dnp dnr dpa dpb dpd dpk dpn dpp dpr dra drb drd drk drn drp drr ka- kaa kab kad kak kan kap kar kba kbb kbd kbk kbn kbp kbr kda kdb kdk kdp kdr kkb kkk kkn kkp kkr kn- kna knd knk knn knp knr kpa kpd kpk kpn kpp kpr kra krd krk krn krp krr naa nab nad nak nan nap nar nba nbb nbd nbk nbn nbp nbr nda ndb ndd ndk ndn ndp ndr nka nkk nkn nkp nkr nna nnb nnk nnn nnp npa npb npd npn npp npr nra nrb nrd nrk nrn nrp nrr p-p paa pab pad pak pan pap par pba pbb pbd pbk pbn pbp pbr pda pdb pdd pdk pdn pdp pdr pka pkb pkd pkn pkp pkr pn- pna pnb pnd pnk pnn pnp pnr ppa ppb ppd ppk ppn ppp ppr pra prb prd prk prn prp prr ra- raa rab rad rak ran rap rar rba rbb rbd rbk rbn rbp rbr rda rdb rdd rdn rdp rdr rkb rkk rkp rna rnb rnd rnn rnp rnr rpa rpb rpd rpk rpn rpp rpr rra rrb rrd rrk rrn rrp rrr