-al -er -ol a-a a-b aaa aab aae aal aan aao aar aau ab- aba abb abe abl abn abo abr abu aea aeb aee ael aen aeo aer aeu al- ala alb ale all aln alo alr alu an- ana anb ane anl ann ano anr anu aoa aob aoe aol aon aoo aor aou ar- ara arb are arl arn aro arr aru au- aua aub aue aul aun auo aur b-u baa bab bae bal ban bao bar bau bba bbb bbe bbl bbn bbo bbr bbu be- bea beb bee bel ben beo ber beu bla blb ble bll bln blo blr blu bna bnb bne bnl bnn bno bnr bnu boa bob boe bol bon boo bor bou bra brb bre brl brn bro brr bru bua bub bue bul bun buo bur buu eaa eab eae eal ean eao ear eau eba ebb ebe ebl ebn ebo ebr ebu eea eeb eee eel een eeo eer ela elb ele ell eln elo elr elu en- ena enb ene enl enn eno enr enu eo- eoa eob eoe eol eon eoo eor eou era erb ere erl ern ero err eru eu- eua eub eue eul eun eur la- laa lab lae lal lan lao lar lau lba lbb lbe lbl lbo lbr lbu lea leb lee lel len leo ler leu lla llb lle lll lln llo llr llu lna lnb lne lnl lnn lno lnr lnu loa lob loe lol lon loo lor lou lra lrb lrn lro lrr lru lua lub lue lul lun luo lur luu naa nab nae nal nan nao nar nau nba nbb nbe nbl nbn nbo nbr nbu ne- nea neb nee nel nen neo ner neu nla nlb nle nll nln nlo nlr nlu nna nnb nne nnl nnn nno nnu no- noa nob noe nol non noo nor nou nra nrb nre nrl nrn nro nrr nru nua nub nue nul nun nuo nur nuu oaa oab oae oal oan oao oar oau ob- oba obb obe obl obn obo obr obu oea oeb oee oel oen oeo oer ola olb ole oll oln olo olu on- ona onb one onl onn ono onr onu oo- ooa oob ool oon ooo oor or- ora orb ore orl orn oro orr oru ou- oua oue oul oun ouo our ra- raa rab rae ral ran rao rar rau rba rbb rbe rbl rbn rbo rbr rbu re- rea reb ree rel ren reo rer reu rla rle rll rln rlo rlr rlu rna rnb rnn rno rnr rnu roa rob roe rol ron roo ror rou rra rrb rrl rrn rrr rru rua rub rue run ruo rur ruu ua- uaa uab uae ual uan uao uar uau uba ubb ube ubl ubn ubo ubr ubu uea ueb uee uel uen uer ula ulb ule ull uln ulo ulr ulu un- una unb une unl unn uno unr unu uoa uob uoe uol uon uoo uor ur- ura urb ure url urn uro urr uru uua uue uun uur uuu