-al -ol a-a a-b aaa aab aag aal aao aas ab- aba abb abg abl abo abs ag- aga agb agg agl ago ags al- ala alb alg all alo als aoa aob aog aol aoo aos as- asa asb asg asl aso ass baa bab bag bal bao bas bba bbb bbg bbl bbo bbs bga bgb bgg bgl bgo bgs bla blb blg bll blo bls boa bob bog bol boo bos bsa bsb bsg bsl bso bss gaa gab gag gal gao gas gba gbg gbl gbo gbs gga ggb ggg ggo ggs gla glb glg gll glo gls goa gob gog gol goo gos gsa gsb gsg gsl gso gss la- laa lab lag lal lao las lba lbb lbg lbl lbo lbs lga lgb lgg lgl lgo lgs lla llb llg lll llo lls loa lob log lol loo los lsa lsb lsg lsl lso lss oaa oab oag oal oao oas ob- oba obb obg obl obo obs oga ogg ogl ogo ogs ola olb olg oll olo ols oo- ooa oob oog ool ooo oos os- osa osb osg osl oso oss saa sab sag sal sao sas sba sbb sbg sbl sbo sbs sga sgb sgg sgl sgo sgs sla slb slg sll slo sls soa sob sog sol soo sos ss- ssa ssb ssg ssl sso sss