a-a a-b a-t aaa aab aaj aao aar aas aat ab- aba abb abj abo abr abs abt aja ajb ajj ajo ajr ajs ajt aoa aob aoj aoo aor aos aot ar- ara arb arj aro arr ars art as- asa asb asj aso asr ass ast at- ata atb ato atr ats att baa bab baj bao bar bas bat bba bbb bbo bbr bbs bbt bja bjj bjr bjs bjt boa bob boj boo bor bos bot bra brb brj bro brr brs brt bsa bsb bsj bso bsr bss bst bta btb bto btr bts btt jaa jab jaj jao jar jas jat jba jbj jbo jbr jbs jbt jja jjb jjj jjr jjs joa job joj joo jor jos jot jra jrb jro jrr jrs jrt jsa jsb jsj jso jsr jss jst jta jtb jtr jts jtt oaa oab oaj oao oar oas oat ob- oba obb obj obo obr obs obt oja ojb ojo ojs oo- ooa oob ooo oor oos oot or- ora orb oro orr ors ort os- osa osb osj oso osr oss ost ot- ota otb oto otr ots ott ra- raa rab raj rao rar ras rat rba rbb rbo rbr rbs rbt rja rjr roa rob roj roo ror ros rot rra rrb rrr rrs rrt rsa rsb rsj rso rsr rss rst rta rtb rtj rto rtr rts rtt saa sab saj sao sar sas sat sba sbb sbj sbo sbr sbs sbt sja sjb sjj sjr sjs sjt soa sob soj soo sor sos sot sr- sra srb srj sro srr srs srt ss- ssa ssb ssj sso ssr sss sst sta stb stj sto str sts stt taa tab taj tao tar tas tat tba tbb tbj tbo tbr tbs tbt tjo tjr tjs to- toa tob toj too tor tos tot tra trb tro trr trs trt tsa tsb tsj tso tsr tss tst tta ttb tto ttr tts ttt