a-a a-b aaa aab aak aan aas aay ab- aba abb abk abn abs aby aka akb akk akn aks an- ana anb ank ann ans any as- asa asb ask asn ass asy ay- aya ayk ayn ays baa bab bak ban bas bay bba bbb bbk bbn bbs bby bka bkb bkk bkn bks bna bnb bnk bnn bns bsa bsb bsk bsn bss bsy by- bya byk byn bys ka- kaa kab kak kan kas kay kba kbb kbk kbn kbs kkb kkk kkn kks kky kn- kna knk knn ksa ksb ksk ksn kss kya kyn kys naa nab nak nan nas nay nba nbb nbk nbn nbs nka nkk nkn nks nky nna nnb nnk nnn nns nsa nsb nsk nsn nss nsy nya nyk nyn nys nyy saa sab sak san sas say sba sbb sbk sbn sbs sby sk- ska skb skk sks sky sna snb snk snn sns sny ss- ssa ssb ssk ssn sss sy- sya syb syk syn sys yaa yab yak yan yas yay ybs yby yka ykk ykn yna ynk ynn yns yny ysa ysb ysk yss ysy yyb yys yyy