a-a a-b aaa aab aad aah aak aar ab- aba abb abd abh abk abr ad- ada adb add adh adk adr aha ahb ahd ahh ahk ahr aka akb akd akh akk akr ar- ara arb ard arh ark arr baa bab bad bah bak bar bba bbb bbd bbh bbk bbr bda bdb bdd bdh bdk bdr bha bhb bhd bhh bhk bhr bka bkb bkk bkr bra brb brd brh brk brr daa dab dad dah dak dar dba dbb dbd dbh dbk dbr dda ddb ddd ddh ddk ddr dh- dha dhb dhd dhh dhk dhr dka dkb dkk dkr dra drb drd drk drr haa hab had hah hak har hba hbb hbd hbh hbk hbr hda hdb hdd hdh hdk hdr hha hhb hhd hhh hhk hhr hka hkb hkd hkh hkk hkr hr- hra hrb hrd hrh hrk hrr ka- kaa kab kad kah kak kar kba kbb kbd kbh kbk kbr kda kdb kdh kdk kdr kha khh khk khr kkb kkh kkk kkr kra krd krk krr ra- raa rab rad rah rak rar rba rbb rbd rbh rbk rbr rda rdb rdd rdh rdr rh- rha rhb rhd rhh rhr rkb rkk rra rrb rrd rrh rrk rrr