a-a a-b aaa aab aak aan aao aar aaw ab- aba abb abk abn abo abr abw aka akb akk akn ako akr akw an- ana anb ank ann ano anr aoa aob aok aon aoo aor aow ar- ara arb ark arn aro arr arw aw- awa awb awk awn awo awr aww baa bab bak ban bao bar baw bba bbb bbk bbn bbo bbr bbw bka bkb bkk bkn bko bkr bkw bna bnb bnk bnn bno bnr bnw boa bob bok bon boo bor bow bra brb brk brn bro brr brw bwa bwb bwk bwo bwr ka- kaa kab kak kan kao kar kaw kba kbb kbk kbn kbo kbr kbw kkb kkk kkn kkr kn- kna knk knn kno knr koa kob kok kon koo kor kow kra krk krn kro krr krw kw- kwa kwk kwo kww naa nab nak nan nao nar naw nba nbb nbk nbn nbo nbr nbw nka nkk nkn nko nkr nna nnb nnk nnn nno nnw no- noa nob nok non noo nor now nra nrb nrk nrn nro nrr nrw nwa nwb nwn nwo nwr oaa oab oak oan oao oar oaw ob- oba obb obk obn obo obr obw oka okb okk oko okr okw on- ona onb onk onn ono onr oo- ooa oob ook oon ooo oor oow or- ora orb ork orn oro orr owa owb owk own owo oww ra- raa rab rak ran rao rar raw rba rbb rbk rbn rbo rbr rbw rkb rkk rko rna rnb rnn rno rnr rnw roa rob rok ron roo ror row rra rrb rrk rrn rrr rwa rwb rwr waa wab wak wan wao war waw wba wbb wbn wbo wbr wbw wka wkb wko wkr wkw wn- wna wnn wno wnw woa wob wok won woo wor wow wr- wra wrk wrn wro wrr wrw wwa wwn wwo www