-al -er -ol a-a a-b aaa aab aae aaf aal aao aar aau ab- aba abb abe abf abl abo abr abu aea aeb aee aef ael aeo aer aeu af- afa afb afe aff afl afo afr afu al- ala alb ale alf all alo alr alu aoa aob aoe aof aol aoo aor aou ar- ara arb are arf arl aro arr aru au- aua aub aue auf aul auo aur b-u baa bab bae baf bal bao bar bau bba bbb bbe bbf bbl bbo bbr bbu be- bea beb bee bef bel beo ber beu bfa bfb bfe bff bfl bfo bfr bfu bla blb ble blf bll blo blr blu boa bob boe bof bol boo bor bou bra brb bre brf brl bro brr bru bua bub bue buf bul buo bur buu eaa eab eae eaf eal eao ear eau eba ebb ebe ebf ebl ebo ebr ebu eea eeb eee eef eel eeo eer ef- efa efb efe eff efl efo efr ela elb ele elf ell elo elr elu eo- eoa eob eoe eof eol eoo eor eou era erb ere erf erl ero err eru eu- eua eub eue euf eul eur faa fab fae faf fal fao far fau fba fbb fbe fbf fbl fbo fbr fbu fea feb fee fef fel feo fer feu ffa ffe fff ffl ffo ffr ffu 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 la- laa lab lae laf lal lao lar lau lba lbb lbe lbf lbl lbo lbr lbu lea leb lee lef lel leo ler leu lfa lfb lfe lff lfl lfo lfr lfu lla llb lle llf lll llo llr llu loa lob loe lof lol loo lor lou lra lrb lrf lro lrr lru lua lub lue luf lul luo lur luu oaa oab oae oaf oal oao oar oau ob- oba obb obe obf obl obo obr obu oea oeb oee oef oel oeo oer of- ofa ofb ofe off ofl ofo ofr ofu ola olb ole olf oll olo olu oo- ooa oob oof ool ooo oor or- ora orb ore orf orl oro orr oru ou- oua oue ouf oul ouo our ra- raa rab rae raf ral rao rar rau rba rbb rbe rbf rbl rbo rbr rbu re- rea reb ree ref rel reo rer reu rfa rfb rfe rff rfl rfo rfr rfu rla rle rlf rll rlo rlr rlu roa rob roe rof rol roo ror rou rra rrb rrf rrl rrr rru rua rub rue ruf ruo rur ruu ua- uaa uab uae uaf ual uao uar uau uba ubb ube ubf ubl ubo ubr ubu uea ueb uee uef uel uer ufa ufe uff ufl ufo ufr ufu ula ulb ule ulf ull ulo ulr ulu uoa uob uoe uol uoo uor ur- ura urb ure urf url uro urr uru uua uue uur uuu