a-a a-b aaa aab aah aaj aao aar aas ab- aba abb abh abj abo abr abs aha ahb ahh ahj aho ahr ahs aja ajb ajh ajj ajo ajr ajs aoa aob aoh aoj aoo aor aos ar- ara arb arh arj aro arr ars as- asa asb ash asj aso asr ass baa bab bah baj bao bar bas bba bbb bbh bbo bbr bbs bha bhb bhh bhj bho bhr bhs bja bjj bjr bjs boa bob boh boj boo bor bos bra brb brh brj bro brr brs bsa bsb bsh bsj bso bsr bss haa hab hah haj hao har has hba hbb hbh hbj hbo hbr hbs hha hhb hhh hhj hho hhr hhs hja hjo hjr hjs hoa hob hoh hoo hor hos hr- hra hrb hrh hrj hro hrr hrs hsa hsb hsh hsj hsr hss jaa jab jah jaj jao jar jas jba jbj jbo jbr jbs jha jhj jho jhr jhs jja jjb jjj jjr jjs joa job joh joj joo jor jos jra jrb jro jrr jrs jsa jsb jsh jsj jso jsr jss oaa oab oah oaj oao oar oas ob- oba obb obh obj obo obr obs oha ohh oho ohr ohs oja ojb ojo ojs oo- ooa oob ooh ooo oor oos or- ora orb orh oro orr ors os- osa osb osh osj oso osr oss ra- raa rab rah raj rao rar ras rba rbb rbh rbo rbr rbs rh- rha rhb rhh rho rhr rhs rja rjr roa rob roh roj roo ror ros rra rrb rrh rrr rrs rsa rsb rsh rsj rso rsr rss saa sab sah saj sao sar sas sba sbb sbh sbj sbo sbr sbs sh- sha shb shh sho shr shs sja sjb sjh sjj sjr sjs soa sob soh soj soo sor sos sr- sra srb srh srj sro srr srs ss- ssa ssb ssh ssj sso ssr sss