-al -ol a-a a-b a-c aaa aab aac aag aal aao aar aas ab- aba abb abc abg abl abo abr abs ac- aca acb acc acg acl aco acr acs ag- aga agb agc agg agl ago agr ags al- ala alb alc alg all alo alr als aoa aob aoc aog aol aoo aor aos ar- ara arb arc arg arl aro arr ars as- asa asb asc asg asl aso asr ass baa bab bac bag bal bao bar bas bba bbb bbc bbg bbl bbo bbr bbs bca bcb bcc bcg bcl bco bcr bcs bga bgb bgc bgg bgl bgo bgr bgs bla blb blc blg bll blo blr bls boa bob boc bog bol boo bor bos bra brb brg brl bro brr brs bsa bsb bsc bsg bsl bso bsr bss c-- caa cab cac cag cal cao car cas cba cbb cbc cbg cbl cbo cbr cbs cca ccb ccc ccg ccl cco ccr ccs cga cgb cgc cgg cgl cgo cgr cgs cl- cla clb clc clg cll clo clr cls co- coa cob coc cog col coo cor cos cra crb crc crg crl cro crr crs csa csb csc csg csl cso csr css gaa gab gac gag gal gao gar gas gba gbc gbg gbl gbo gbr gbs gca gcb gcc gcg gcl gco gcr gcs gga ggb ggc ggg ggo ggr ggs gla glb glc glg gll glo glr gls goa gob goc gog gol goo gor gos gra grb grc grg grl gro grr grs gsa gsb gsc gsg gsl gso gsr gss la- laa lab lac lag lal lao lar las lba lbb lbc lbg lbl lbo lbr lbs lca lcb lcc lcg lcl lco lcr lcs lga lgb lgc lgg lgl lgo lgr lgs lla llb llc llg lll llo llr lls loa lob loc log lol loo lor los lra lrb lrc lrg lro lrr lrs lsa lsb lsc lsg lsl lso lsr lss oaa oab oac oag oal oao oar oas ob- oba obb obc obg obl obo obr obs oc- oca ocb occ ocg ocl oco ocr ocs oga ogc ogg ogl ogo ogs ola olb olc olg oll olo ols oo- ooa oob ooc oog ool ooo oor oos or- ora orb orc org orl oro orr ors os- osa osb osc osg osl oso osr oss ra- raa rab rac rag ral rao rar ras rba rbb rbc rbg rbl rbo rbr rbs rca rcb rcc rcg rcl rco rcr rcs rga rgb rgc rgg rgo rgr rgs rla rlc rlg rll rlo rlr rls roa rob roc rog rol roo ror ros rra rrb rrc rrg rrl rrr rrs rsa rsb rsc rsg rsl rso rsr rss saa sab sac sag sal sao sar sas sba sbb sbc sbg sbl sbo sbr sbs sca scb scc scg scl sco scr scs sga sgb sgc sgg sgl sgo sgr sgs sla slb slc slg sll slo slr sls soa sob soc sog sol soo sor sos sr- sra srb src srg srl sro srr srs ss- ssa ssb ssc ssg ssl sso ssr sss