a-a a-b aaa aab aaj aao aas aau ab- aba abb abj abo abs abu aja ajb ajj ajo ajs aju aoa aob aoj aoo aos aou as- asa asb asj aso ass asu au- aua aub auj auo aus b-u baa bab baj bao bas bau bba bbb bbo bbs bbu bja bjj bjs bju boa bob boj boo bos bou bsa bsb bsj bso bss bsu bua bub buj buo bus buu jaa jab jaj jao jas jau jba jbj jbo jbs jbu jja jjb jjj jjs jju joa job joj joo jos jou jsa jsb jsj jso jss jsu jub juo jus oaa oab oaj oao oas oau ob- oba obb obj obo obs obu oja ojb ojo ojs oju oo- ooa oob ooo oos os- osa osb osj oso oss osu ou- oua ouo ous saa sab saj sao sas sau sba sbb sbj sbo sbs sbu sja sjb sjj sjs sju soa sob soj soo sos sou ss- ssa ssb ssj sso sss ssu sua sub suo sus suu ua- uaa uab uaj uao uas uau uba ubb ubo ubs ubu ujo ujs uoa uob uoj uoo uos usa usb usj uso uss usu uua uus uuu