-al -ol a-a a-b aaa aab aah aal aao aar aas ab- aba abb abh abl abo abr abs aha ahb ahh ahl aho ahr ahs al- ala alb alh all alo alr als aoa aob aoh aol aoo aor aos ar- ara arb arh arl aro arr ars as- asa asb ash asl aso asr ass baa bab bah bal bao bar bas bba bbb bbh bbl bbo bbr bbs bha bhb bhh bhl bho bhr bhs bla blb blh bll blo blr bls boa bob boh bol boo bor bos bra brb brh brl bro brr brs bsa bsb bsh bsl bso bsr bss haa hab hah hal hao har has hba hbb hbh hbl hbo hbr hbs hha hhb hhh hhl hho hhr hhs hla hlb hlh hll hlo hlr hls hoa hob hoh hol hoo hor hos hr- hra hrb hrh hrl hro hrr hrs hsa hsb hsh hsl hsr hss la- laa lab lah lal lao lar las lba lbb lbh lbl lbo lbr lbs lha lhb lhh lho lhr lhs lla llb lll llo llr lls loa lob loh lol loo lor los lra lrb lrh lro lrr lrs lsa lsb lsh lsl lso lsr lss oaa oab oah oal oao oar oas ob- oba obb obh obl obo obr obs oha ohh ohl oho ohr ohs ola olb oll olo ols oo- ooa oob ooh ool ooo oor oos or- ora orb orh orl oro orr ors os- osa osb osh osl oso osr oss ra- raa rab rah ral rao rar ras rba rbb rbh rbl rbo rbr rbs rh- rha rhb rhh rhl rho rhr rhs rla rlh rll rlo rlr rls roa rob roh rol roo ror ros rra rrb rrh rrl rrr rrs rsa rsb rsh rsl rso rsr rss saa sab sah sal sao sar sas sba sbb sbh sbl sbo sbr sbs sh- sha shb shh shl sho shr shs sla slb slh sll slo slr sls soa sob soh sol soo sor sos sr- sra srb srh srl sro srr srs ss- ssa ssb ssh ssl sso ssr sss