-al -ol a-a a-b aaa aab aag aal aao aar aav ab- aba abb abg abl abo abr abv ag- aga agb agg agl ago agr agv al- ala alb alg all alo alr alv aoa aob aog aol aoo aor aov ar- ara arb arg arl aro arr arv av- ava avb avg avl avo avr baa bab bag bal bao bar bav bba bbb bbg bbl bbo bbr bga bgb bgg bgl bgo bgr bgv bla blb blg bll blo blr blv boa bob bog bol boo bor bov bra brb brg brl bro brr brv bva bvb bvg bvl bvo bvr bvv gaa gab gag gal gao gar gav gba gbg gbl gbo gbr gbv gga ggb ggg ggo ggr ggv gla glb glg gll glo glr glv goa gob gog gol goo gor gov gra grb grg grl gro grr grv gva gvb gvg gvl gvo gvr la- laa lab lag lal lao lar lav lba lbb lbg lbl lbo lbr lbv lga lgb lgg lgl lgo lgr lgv lla llb llg lll llo llr llv loa lob log lol loo lor lov lra lrb lrg lro lrr lrv lva lvb lvg lvl lvr lvv oaa oab oag oal oao oar oav ob- oba obb obg obl obo obr obv oga ogg ogl ogo ola olb olg oll olo oo- ooa oob oog ool ooo oor oov or- ora orb org orl oro orr orv ov- ova ovb ovl ovo ovv ra- raa rab rag ral rao rar rav rba rbb rbg rbl rbo rbr rga rgb rgg rgo rgr rgv rla rlg rll rlo rlr roa rob rog rol roo ror rov rra rrb rrg rrl rrr rva rvb rvg rvl rvo rvr rvv v-a vaa vab vag val vao var vav vba vbg vbl vbo vbr vbv vga vgg vgl vgo vgr vl- vla vlb vll vlo vlv voa vob vog vol voo vor vov vra vrb vrg vrr vva vvb vvg vvo vvr vvv