a-a a-b aaa aab aak aan aar aaw ab- aba abb abk abn abr abw aka akb akk akn akr akw an- ana anb ank ann anr ar- ara arb ark arn arr arw aw- awa awb awk awn awr aww baa bab bak ban bar baw bba bbb bbk bbn bbr bbw bka bkb bkk bkn bkr bkw bna bnb bnk bnn bnr bnw bra brb brk brn brr brw bwa bwb bwk bwr ka- kaa kab kak kan kar kaw kba kbb kbk kbn kbr kbw kkb kkk kkn kkr kn- kna knk knn knr kra krk krn krr krw kw- kwa kwk kww naa nab nak nan nar naw nba nbb nbk nbn nbr nbw nka nkk nkn nkr nna nnb nnk nnn nnw nra nrb nrk nrn nrr nrw nwa nwb nwn nwr ra- raa rab rak ran rar raw rba rbb rbk rbn rbr rbw rkb rkk rna rnb rnn rnr rnw rra rrb rrk rrn rrr rwa rwb rwr waa wab wak wan war waw wba wbb wbn wbr wbw wka wkb wkr wkw wn- wna wnn wnw wr- wra wrk wrn wrr wrw wwa wwn www