-th a-a a-b a-t aaa aab aad aah aao aar aat ab- aba abb abd abh abo abr abt ad- ada adb add adh ado adr adt aha ahb ahd ahh aho ahr aht aoa aob aod aoh aoo aor aot ar- ara arb ard arh aro arr art at- ata atb atd ath ato atr att baa bab bad bah bao bar bat bba bbb bbd bbh bbo bbr bbt bda bdb bdd bdh bdo bdr bdt bha bhb bhd bhh bho bhr bht boa bob bod boh boo bor bot bra brb brd brh bro brr brt bta btb btd bth bto btr btt daa dab dad dah dao dar dat dba dbb dbd dbh dbo dbr dbt dda ddb ddd ddh ddo ddr ddt dh- dha dhb dhd dhh dho dhr dht doa dob dod doh doo dor dot dra drb drd dro drr drt dta dtb dtd dth dto dtr dtt haa hab had hah hao har hat hba hbb hbd hbh hbo hbr hbt hda hdb hdd hdh hdo hdr hdt hha hhb hhd hhh hho hhr hht hoa hob hod hoh hoo hor hot hr- hra hrb hrd hrh hro hrr hrt hta htb htd hth hto htr htt oaa oab oad oah oao oar oat ob- oba obb obd obh obo obr obt oda odb odd odh odo odr odt oha ohd ohh oho ohr oht oo- ooa oob ood ooh ooo oor oot or- ora orb ord orh oro orr ort ot- ota otb otd oth oto otr ott ra- raa rab rad rah rao rar rat rba rbb rbd rbh rbo rbr rbt rda rdb rdd rdh rdo rdr rdt rh- rha rhb rhd rhh rho rhr rht roa rob rod roh roo ror rot rra rrb rrd rrh rrr rrt rta rtb rtd rto rtr rtt taa tab tad tah tao tar tat tba tbb tbd tbh tbo tbr tbt tda tdb tdd tdh tdo tdr tdt th- tha thb thd thh tho thr tht to- toa tob tod toh too tor tot tra trb trd trh tro trr trt tta ttb ttd tth tto ttr ttt