-al -ol a-a a-b aaa aab aag aal aao aax ab- aba abb abg abl abo abx ag- aga agb agg agl ago agx al- ala alb alg all alo alx aoa aob aog aol aoo aox ax- axa axl axo axx baa bab bag bal bao bax bba bbb bbg bbl bbo bbx bga bgb bgg bgl bgo bgx bla blb blg bll blo blx boa bob bog bol boo box bxb bxl bxo bxx gaa gab gag gal gao gba gbg gbl gbo gbx gga ggb ggg ggo gla glb glg gll glo glx goa gob gog gol goo gox gxa gxl la- laa lab lag lal lao lax lba lbb lbg lbl lbo lbx lga lgb lgg lgl lgo lla llb llg lll llo loa lob log lol loo lox lxo lxx oaa oab oag oal oao oax ob- oba obb obg obl obo obx oga ogg ogl ogo ogx ola olb olg oll olo oo- ooa oob oog ool ooo oox ox- oxa oxb oxo oxx xaa xag xal xbl xbx xgl xla xlb xlg xoa xog xoo xox xxl xxo xxx