a-a a-b aaa aab aan aas aau aay ab- aba abb abn abs abu aby an- ana anb ann ans anu any as- asa asb asn ass asu asy au- aua aub aun aus ay- aya ayn ays ayu b-u baa bab ban bas bau bay bba bbb bbn bbs bbu bby bna bnb bnn bns bnu bsa bsb bsn bss bsu bsy bua bub bun bus buu buy by- bya byn bys byu naa nab nan nas nau nay nba nbb nbn nbs nbu nna nnb nnn nns nnu nsa nsb nsn nss nsu nsy nua nub nun nus nuu nuy nya nyn nys nyu nyy saa sab san sas sau say sba sbb sbn sbs sbu sby sna snb snn sns snu sny ss- ssa ssb ssn sss ssu sua sub sun sus suu suy sy- sya syb syn sys syu ua- uaa uab uan uas uau uay uba ubb ubn ubs ubu uby un- una unb unn uns unu uny usa usb usn uss usu uua uun uus uuu uys uyu yaa yab yan yas yau yay ybs yby yna ynn yns ynu yny ysa ysb yss ysu ysy yua yun yus yuu yuy yyb yys yyu yyy