-al -ol a-a a-b a-c aaa aab aac aag aah aal aao aar aas ab- aba abb abc abg abh abl abo abr abs ac- aca acb acc acg ach acl aco acr acs ag- aga agb agc agg agh agl ago agr ags aha ahb ahc ahg ahh ahl aho ahr ahs al- ala alb alc alg alh all alo alr als aoa aob aoc aog aoh aol aoo aor aos ar- ara arb arc arg arh arl aro arr ars as- asa asb asc asg ash asl aso asr ass baa bab bac bag bah bal bao bar bas bba bbb bbc bbg bbh bbl bbo bbr bbs bca bcb bcc bcg bch bcl bco bcr bcs bga bgb bgc bgg bgh bgl bgo bgr bgs bha bhb bhc bhg bhh bhl bho bhr bhs bla blb blc blg blh bll blo blr bls boa bob boc bog boh bol boo bor bos bra brb brg brh brl bro brr brs bsa bsb bsc bsg bsh bsl bso bsr bss c-- caa cab cac cag cah cal cao car cas cba cbb cbc cbg cbh cbl cbo cbr cbs cca ccb ccc ccg cch ccl cco ccr ccs cga cgb cgc cgg cgh cgl cgo cgr cgs ch- cha chb chc chg chh chl cho chr chs cl- cla clb clc clg clh cll clo clr cls co- coa cob coc cog coh col coo cor cos cra crb crc crg crh crl cro crr crs csa csb csc csg csh csl cso csr css gaa gab gac gag gah gal gao gar gas gba gbc gbg gbh gbl gbo gbr gbs gca gcb gcc gcg gch gcl gco gcr gcs gga ggb ggc ggg ggh ggo ggr ggs gha ghb ghc ghg ghh ghl gho ghr ghs gla glb glc glg glh gll glo glr gls goa gob goc gog goh gol goo gor gos gra grb grc grg grh grl gro grr grs gsa gsb gsc gsg gsl gso gsr gss haa hab hac hag hah hal hao har has hba hbb hbc hbg hbh hbl hbo hbr hbs hca hcb hcc hcg hch hcl hco hcr hcs hga hgb hgc hgg hgh hgl hgo hgr hgs hha hhb hhc hhg hhh hhl hho hhr hhs hla hlb hlc hlg hlh hll hlo hlr hls hoa hob hoc hog hoh hol hoo hor hos hr- hra hrb hrc hrg hrh hrl hro hrr hrs hsa hsb hsc hsg hsh hsl hsr hss la- laa lab lac lag lah lal lao lar las lba lbb lbc lbg lbh lbl lbo lbr lbs lca lcb lcc lcg lch lcl lco lcr lcs lga lgb lgc lgg lgh lgl lgo lgr lgs lha lhb lhc lhh lho lhr lhs lla llb llc llg lll llo llr lls loa lob loc log loh lol loo lor los lra lrb lrc lrg lrh lro lrr lrs lsa lsb lsc lsg lsh lsl lso lsr lss oaa oab oac oag oah oal oao oar oas ob- oba obb obc obg obh obl obo obr obs oc- oca ocb occ ocg och ocl oco ocr ocs oga ogc ogg ogh ogl ogo ogs oha ohc ohg ohh ohl oho ohr ohs ola olb olc olg oll olo ols oo- ooa oob ooc oog ooh ool ooo oor oos or- ora orb orc org orh orl oro orr ors os- osa osb osc osg osh osl oso osr oss ra- raa rab rac rag rah ral rao rar ras rba rbb rbc rbg rbh rbl rbo rbr rbs rca rcb rcc rcg rch rcl rco rcr rcs rga rgb rgc rgg rgh rgo rgr rgs rh- rha rhb rhc rhg rhh rhl rho rhr rhs rla rlc rlg rlh rll rlo rlr rls roa rob roc rog roh rol roo ror ros rra rrb rrc rrg rrh rrl rrr rrs rsa rsb rsc rsg rsh rsl rso rsr rss saa sab sac sag sah sal sao sar sas sba sbb sbc sbg sbh sbl sbo sbr sbs sca scb scc scg sch scl sco scr scs sga sgb sgc sgg sgh sgl sgo sgr sgs sh- sha shb shc shg shh shl sho shr shs sla slb slc slg slh sll slo slr sls soa sob soc sog soh sol soo sor sos sr- sra srb src srg srh srl sro srr srs ss- ssa ssb ssc ssg ssh ssl sso ssr sss