-al -ol a-a a-b a-t aaa aab aaf aal aao aar aat aav ab- aba abb abf abl abo abr abt abv af- afa afb aff afl afo afr aft afv al- ala alb alf all alo alr alt alv aoa aob aof aol aoo aor aot aov ar- ara arb arf arl aro arr art arv at- ata atb atf atl ato atr att atv av- ava avb avf avl avo avr avt baa bab baf bal bao bar bat bav bba bbb bbf bbl bbo bbr bbt bfa bfb bff bfl bfo bfr bft bfv bla blb blf bll blo blr blt blv boa bob bof bol boo bor bot bov bra brb brf brl bro brr brt brv bta btb btf btl bto btr btt btv bva bvb bvl bvo bvr bvt bvv faa fab faf fal fao far fat fav fba fbb fbf fbl fbo fbr fbt ffa fff ffl ffo ffr fft ffv fla flb flf fll flo flr flt foa fob fof fol foo for fot fra frb frf frl fro frr frt fta ftb ftf ftl fto ftr ftt ftv fva fvt la- laa lab laf lal lao lar lat lav lba lbb lbf lbl lbo lbr lbt lbv lfa lfb lff lfl lfo lfr lft lla llb llf lll llo llr llt llv loa lob lof lol loo lor lot lov lra lrb lrf lro lrr lrt lrv lta ltb ltf ltl lto ltr ltt ltv lva lvb lvf lvl lvr lvt lvv oaa oab oaf oal oao oar oat oav ob- oba obb obf obl obo obr obt obv of- ofa ofb off ofl ofo ofr oft ofv ola olb olf oll olo olt oo- ooa oob oof ool ooo oor oot oov or- ora orb orf orl oro orr ort orv ot- ota otb otf otl oto otr ott otv ov- ova ovb ovf ovl ovo ovv ra- raa rab raf ral rao rar rat rav rba rbb rbf rbl rbo rbr rbt rfa rfb rff rfl rfo rfr rft rfv rla rlf rll rlo rlr rlt roa rob rof rol roo ror rot rov rra rrb rrf rrl rrr rrt rta rtb rtf rtl rto rtr rtt rtv rva rvb rvf rvl rvo rvr rvt rvv taa tab taf tal tao tar tat tav tba tbb tbf tbl tbo tbr tbt tbv tfa tfb tff tfl tfo tfr tft tla tlf tll tlo tlr tlt tlv to- toa tob tof tol too tor tot tov tra trb trf trl tro trr trt trv tta ttb ttf ttl tto ttr ttt ttv tva tvb tvf tvl tvo tvr tvt v-a vaa vab val vao var vat vav vba vbl vbo vbr vbv vfa vfb vff vfl vfr vft vfv vl- vla vlb vlf vll vlo vlt vlv voa vob vof vol voo vor vot vov vra vrb vrf vrr vrt vta vtb vtl vto vtr vtt vtv vva vvb vvo vvr vvt vvv