a-a a-b a-t aaa aab aaj aao aas aat aau ab- aba abb abj abo abs abt abu aja ajb ajj ajo ajs ajt aju aoa aob aoj aoo aos aot aou as- asa asb asj aso ass ast asu at- ata atb ato ats att atu au- aua aub auj auo aus aut b-u baa bab baj bao bas bat bau bba bbb bbo bbs bbt bbu bja bjj bjs bjt bju boa bob boj boo bos bot bou bsa bsb bsj bso bss bst bsu bta btb bto bts btt btu bua bub buj buo bus but buu jaa jab jaj jao jas jat jau jba jbj jbo jbs jbt jbu jja jjb jjj jjs jju joa job joj joo jos jot jou jsa jsb jsj jso jss jst jsu jta jtb jts jtt jtu jub juo jus jut oaa oab oaj oao oas oat oau ob- oba obb obj obo obs obt obu oja ojb ojo ojs oju oo- ooa oob ooo oos oot os- osa osb osj oso oss ost osu ot- ota otb oto ots ott otu ou- oua ouo ous out saa sab saj sao sas sat sau sba sbb sbj sbo sbs sbt sbu sja sjb sjj sjs sjt sju soa sob soj soo sos sot sou ss- ssa ssb ssj sso sss sst ssu sta stb stj sto sts stt stu sua sub suo sus sut suu taa tab taj tao tas tat tau tba tbb tbj tbo tbs tbt tbu tjo tjs tju to- toa tob toj too tos tot tou tsa tsb tsj tso tss tst tsu tta ttb tto tts ttt ttu tua tub tuj tuo tus tut tuu ua- uaa uab uaj uao uas uat uau uba ubb ubo ubs ubt ubu ujo ujs uoa uob uoj uoo uos uot usa usb usj uso uss ust usu uta utb utj uto uts utt utu uua uus uut uuu