a-a a-b aaa aab aaj aan aao aas aau ab- aba abb abj abn abo abs abu aja ajb ajj ajn ajo ajs aju an- ana anb anj ann ano ans anu aoa aob aoj aon aoo aos aou as- asa asb asj asn aso ass asu au- aua aub auj aun auo aus b-u baa bab baj ban bao bas bau bba bbb bbn bbo bbs bbu bja bjj bjn bjs bju bna bnb bnj bnn bno bns bnu boa bob boj bon boo bos bou bsa bsb bsj bsn bso bss bsu bua bub buj bun buo bus buu jaa jab jaj jan jao jas jau jba jbj jbo jbs jbu jja jjb jjj jjs jju jna jnj jnn jno jns jnu joa job joj jon joo jos jou jsa jsb jsj jsn jso jss jsu jub jun juo jus naa nab naj nan nao nas nau nba nbb nbn nbo nbs nbu nja njn njs nju nna nnb nnn nno nns nnu no- noa nob noj non noo nos nou nsa nsb nsn nso nss nsu nua nub nuj nun nuo nus nuu oaa oab oaj oan oao oas oau ob- oba obb obj obn obo obs obu oja ojb ojo ojs oju on- ona onb onj onn ono ons onu oo- ooa oob oon ooo oos os- osa osb osj osn oso oss osu ou- oua oun ouo ous saa sab saj san sao sas sau sba sbb sbj sbn sbo sbs sbu sja sjb sjj sjs sju sna snb snj snn sno sns snu soa sob soj son soo sos sou ss- ssa ssb ssj ssn sso sss ssu sua sub sun suo sus suu ua- uaa uab uaj uan uao uas uau uba ubb ubn ubo ubs ubu ujo ujs un- una unb unn uno uns unu uoa uob uoj uon uoo uos usa usb usj usn uso uss usu uua uun uus uuu