-al -er -ol a-a a-b aaa aab aae aaf aal aao aar aau aav ab- aba abb abe abf abl abo abr abu abv aea aeb aee aef ael aeo aer aeu aev af- afa afb afe aff afl afo afr afu afv al- ala alb ale alf all alo alr alu alv aoa aob aoe aof aol aoo aor aou aov ar- ara arb are arf arl aro arr aru arv au- aua aub aue auf aul auo aur auv av- ava avb ave avf avl avo avr avu b-u baa bab bae baf bal bao bar bau bav bba bbb bbe bbf bbl bbo bbr bbu be- bea beb bee bef bel beo ber beu bev bfa bfb bfe bff bfl bfo bfr bfu bfv bla blb ble blf bll blo blr blu blv boa bob boe bof bol boo bor bou bov bra brb bre brf brl bro brr bru brv bua bub bue buf bul buo bur buu bva bvb bve bvl bvo bvr bvu bvv eaa eab eae eaf eal eao ear eau eav eba ebb ebe ebf ebl ebo ebr ebu ebv eea eeb eee eef eel eeo eer eev ef- efa efb efe eff efl efo efr ela elb ele elf ell elo elr elu elv eo- eoa eob eoe eof eol eoo eor eou era erb ere erf erl ero err eru erv eu- eua eub eue euf eul eur euv eva evb eve evf evl evo evr evv faa fab fae faf fal fao far fau fav fba fbb fbe fbf fbl fbo fbr fbu fea feb fee fef fel feo fer feu fev ffa ffe fff ffl ffo ffr ffu ffv fla flb fle flf fll flo flr flu foa fob foe fof fol foo for fou fra frb fre frf frl fro frr fru fua fub fue fuf ful fuo fur fuu fuv fva la- laa lab lae laf lal lao lar lau lav lba lbb lbe lbf lbl lbo lbr lbu lbv lea leb lee lef lel leo ler leu lev lfa lfb lfe lff lfl lfo lfr lfu lla llb lle llf lll llo llr llu llv loa lob loe lof lol loo lor lou lov lra lrb lrf lro lrr lru lrv lua lub lue luf lul luo lur luu luv lva lvb lve lvf lvl lvr lvv oaa oab oae oaf oal oao oar oau oav ob- oba obb obe obf obl obo obr obu obv oea oeb oee oef oel oeo oer of- ofa ofb ofe off ofl ofo ofr ofu ofv ola olb ole olf oll olo olu oo- ooa oob oof ool ooo oor oov or- ora orb ore orf orl oro orr oru orv ou- oua oue ouf oul ouo our ov- ova ovb ove ovf ovl ovo ovv ra- raa rab rae raf ral rao rar rau rav rba rbb rbe rbf rbl rbo rbr rbu re- rea reb ree ref rel reo rer reu rev rfa rfb rfe rff rfl rfo rfr rfu rfv rla rle rlf rll rlo rlr rlu roa rob roe rof rol roo ror rou rov rra rrb rrf rrl rrr rru rua rub rue ruf ruo rur ruu ruv rva rvb rve rvf rvl rvo rvr rvu rvv ua- uaa uab uae uaf ual uao uar uau uav uba ubb ube ubf ubl ubo ubr ubu ubv uea ueb uee uef uel uer ufa ufe uff ufl ufo ufr ufu ufv ula ulb ule ulf ull ulo ulr ulu ulv uoa uob uoe uol uoo uor ur- ura urb ure urf url uro urr uru uua uue uur uuu uva uvb uve uvf uvl uvo uvu uvv v-a v-e vaa vab vae val vao var vau vav vba vbl vbo vbr vbv vea veb vee vef vel veo ver veu vfa vfb vff vfl vfr vfu vfv vl- vla vlb vle vlf vll vlo vlv voa vob voe vof vol voo vor vou vov vra vrb vre vrf vrr vru vue vul vur vuv vva vvb vvo vvr vvv