a-a a-b a-t aaa aab aaj aao aar aas aat aau ab- aba abb abj abo abr abs abt abu aja ajb ajj ajo ajr ajs ajt aju aoa aob aoj aoo aor aos aot aou ar- ara arb arj aro arr ars art aru as- asa asb asj aso asr ass ast asu at- ata atb ato atr ats att atu au- aua aub auj auo aur aus aut b-u baa bab baj bao bar bas bat bau bba bbb bbo bbr bbs bbt bbu bja bjj bjr bjs bjt bju boa bob boj boo bor bos bot bou bra brb brj bro brr brs brt bru bsa bsb bsj bso bsr bss bst bsu bta btb bto btr bts btt btu bua bub buj buo bur bus but buu jaa jab jaj jao jar jas jat jau jba jbj jbo jbr jbs jbt jbu jja jjb jjj jjr jjs jju joa job joj joo jor jos jot jou jra jrb jro jrr jrs jrt jsa jsb jsj jso jsr jss jst jsu jta jtb jtr jts jtt jtu jub juo jur jus jut oaa oab oaj oao oar oas oat oau ob- oba obb obj obo obr obs obt obu oja ojb ojo ojs oju oo- ooa oob ooo oor oos oot or- ora orb oro orr ors ort oru os- osa osb osj oso osr oss ost osu ot- ota otb oto otr ots ott otu ou- oua ouo our ous out ra- raa rab raj rao rar ras rat rau rba rbb rbo rbr rbs rbt rbu rja rjr roa rob roj roo ror ros rot rou rra rrb rrr rrs rrt rru rsa rsb rsj rso rsr rss rst rsu rta rtb rtj rto rtr rts rtt rtu rua rub ruo rur rus rut ruu saa sab saj sao sar sas sat sau sba sbb sbj sbo sbr sbs sbt sbu sja sjb sjj sjr sjs sjt sju soa sob soj soo sor sos sot sou sr- sra srb srj sro srr srs srt ss- ssa ssb ssj sso ssr sss sst ssu sta stb stj sto str sts stt stu sua sub suo sur sus sut suu taa tab taj tao tar tas tat tau tba tbb tbj tbo tbr tbs tbt tbu tjo tjr tjs tju to- toa tob toj too tor tos tot tou tra trb tro trr trs trt tru tsa tsb tsj tso tsr tss tst tsu tta ttb tto ttr tts ttt ttu tua tub tuj tuo tur tus tut tuu ua- uaa uab uaj uao uar uas uat uau uba ubb ubo ubr ubs ubt ubu ujo ujs uoa uob uoj uoo uor uos uot ur- ura urb uro urr urs urt uru usa usb usj uso usr uss ust usu uta utb utj uto utr uts utt utu uua uur uus uut uuu