-th a-a a-b a-t aaa aab aad aah aak aao aar aat ab- aba abb abd abh abk abo abr abt ad- ada adb add adh adk ado adr adt aha ahb ahd ahh ahk aho ahr aht aka akb akd akh akk ako akr aoa aob aod aoh aok aoo aor aot ar- ara arb ard arh ark aro arr art at- ata atb atd ath ato atr att baa bab bad bah bak bao bar bat bba bbb bbd bbh bbk bbo bbr bbt bda bdb bdd bdh bdk bdo bdr bdt bha bhb bhd bhh bhk bho bhr bht bka bkb bkk bko bkr bkt boa bob bod boh bok boo bor bot bra brb brd brh brk bro brr brt bta btb btd bth btk bto btr btt daa dab dad dah dak dao dar dat dba dbb dbd dbh dbk dbo dbr dbt dda ddb ddd ddh ddk ddo ddr ddt dh- dha dhb dhd dhh dhk dho dhr dht dka dkb dkk dko dkr dkt doa dob dod doh dok doo dor dot dra drb drd drk dro drr drt dta dtb dtd dth dtk dto dtr dtt haa hab had hah hak hao har hat hba hbb hbd hbh hbk hbo hbr hbt hda hdb hdd hdh hdk hdo hdr hdt hha hhb hhd hhh hhk hho hhr hht hka hkb hkd hkh hkk hko hkr hkt hoa hob hod hoh hok hoo hor hot hr- hra hrb hrd hrh hrk hro hrr hrt hta htb htd hth htk hto htr htt k-t ka- kaa kab kad kah kak kao kar kat kba kbb kbd kbh kbk kbo kbr kda kdb kdh kdk kdo kdr kdt kha khh khk kho khr kkb kkh kkk kkr kkt koa kob kod koh kok koo kor kot kra krd krk kro krr krt kta ktb kth ktk kto ktr ktt oaa oab oad oah oak oao oar oat ob- oba obb obd obh obk obo obr obt oda odb odd odh odo odr odt oha ohd ohh oho ohr oht oka okb okd okk oko okr oo- ooa oob ood ooh ook ooo oor oot or- ora orb ord orh ork oro orr ort ot- ota otb otd oth otk oto otr ott ra- raa rab rad rah rak rao rar rat rba rbb rbd rbh rbk rbo rbr rbt rda rdb rdd rdh rdo rdr rdt rh- rha rhb rhd rhh rho rhr rht rkb rkk rko rkt roa rob rod roh rok roo ror rot rra rrb rrd rrh rrk rrr rrt rta rtb rtd rtk rto rtr rtt taa tab tad tah tak tao tar tat tba tbb tbd tbh tbk tbo tbr tbt tda tdb tdd tdh tdk tdo tdr tdt th- tha thb thd thh thk tho thr tht tka tkb tkk tko tkr tkt to- toa tob tod toh tok too tor tot tra trb trd trh trk tro trr trt tta ttb ttd tth ttk tto ttr ttt