a-a a-b a-t aaa aab aad aaj aak aao aar aat ab- aba abb abd abj abk abo abr abt ad- ada adb add adj adk ado adr adt aja ajb ajd ajj ajk ajo ajr ajt aka akb akd akj akk ako akr aoa aob aod aoj aok aoo aor aot ar- ara arb ard arj ark aro arr art at- ata atb atd ato atr att baa bab bad baj bak bao bar bat bba bbb bbd bbk bbo bbr bbt bda bdb bdd bdj bdk bdo bdr bdt bja bjd bjj bjk bjr bjt bka bkb bkk bko bkr bkt boa bob bod boj bok boo bor bot bra brb brd brj brk bro brr brt bta btb btd btk bto btr btt daa dab dad daj dak dao dar dat dba dbb dbd dbk dbo dbr dbt dda ddb ddd ddk ddo ddr ddt dj- dja djb djd djk djo djt dka dkb dkk dko dkr dkt doa dob dod doj dok doo dor dot dra drb drd drj drk dro drr drt dta dtb dtd dtj dtk dto dtr dtt j-d jaa jab jad jaj jak jao jar jat jba jbj jbk jbo jbr jbt jda jdb jdo jdr jdt jja jjb jjj jjk jjr jka jkb jkk jko jkr jkt joa job jod joj jok joo jor jot jra jrb jrk jro jrr jrt jta jtb jtk jtr jtt k-t ka- kaa kab kad kaj kak kao kar kat kba kbb kbd kbk kbo kbr kda kdb kdk kdo kdr kdt kjb kjr kkb kkk kkr kkt koa kob kod kok koo kor kot kra krd krk kro krr krt kta ktb ktj ktk kto ktr ktt oaa oab oad oaj oak oao oar oat ob- oba obb obd obj obk obo obr obt oda odb odd odo odr odt oja ojb ojd ojo oka okb okd okj okk oko okr oo- ooa oob ood ook ooo oor oot or- ora orb ord ork oro orr ort ot- ota otb otd otk oto otr ott ra- raa rab rad raj rak rao rar rat rba rbb rbd rbk rbo rbr rbt rda rdb rdd rdj rdo rdr rdt rja rjk rjr rkb rkk rko rkt roa rob rod roj rok roo ror rot rra rrb rrd rrk rrr rrt rta rtb rtd rtj rtk rto rtr rtt taa tab tad taj tak tao tar tat tba tbb tbd tbj tbk tbo tbr tbt tda tdb tdd tdk tdo tdr tdt tjd tjo tjr tka tkb tkk tko tkr tkt to- toa tob tod toj tok too tor tot tra trb trd trk tro trr trt tta ttb ttd ttk tto ttr ttt