a-a a-b aaa aab aad aak aao aar aaw ab- aba abb abd abk abo abr abw ad- ada adb add adk ado adr adw aka akb akd akk ako akr akw aoa aob aod aok aoo aor aow ar- ara arb ard ark aro arr arw aw- awa awb awd awk awo awr aww baa bab bad bak bao bar baw bba bbb bbd bbk bbo bbr bbw bda bdb bdd bdk bdo bdr bdw bka bkb bkk bko bkr bkw boa bob bod bok boo bor bow bra brb brd brk bro brr brw bwa bwb bwd bwk bwo bwr daa dab dad dak dao dar daw dba dbb dbd dbk dbo dbr dda ddb ddd ddk ddo ddr ddw dka dkb dkk dko dkr dkw doa dob dod dok doo dor dow dra drb drd drk dro drr drw dwa dwb dwo dwr dww ka- kaa kab kad kak kao kar kaw kba kbb kbd kbk kbo kbr kbw kda kdb kdk kdo kdr kkb kkk kkr koa kob kod kok koo kor kow kra krd krk kro krr krw kw- kwa kwd kwk kwo kww oaa oab oad oak oao oar oaw ob- oba obb obd obk obo obr obw oda odb odd odo odr oka okb okd okk oko okr okw oo- ooa oob ood ook ooo oor oow or- ora orb ord ork oro orr owa owb owd owk owo oww ra- raa rab rad rak rao rar raw rba rbb rbd rbk rbo rbr rbw rda rdb rdd rdo rdr rkb rkk rko roa rob rod rok roo ror row rra rrb rrd rrk rrr rwa rwb rwd rwr waa wab wad wak wao war waw wba wbb wbd wbo wbr wbw wda wdb wdr wka wkb wkd wko wkr wkw woa wob wod wok woo wor wow wr- wra wrd wrk wro wrr wrw wwa wwd wwo www