-al -ol a-a a-b a-c a-t aaa aab aac aae aal aao aat aau ab- aba abb abc abe abl abo abt abu ac- aca acb acc ace acl aco act acu aea aeb aec aee ael aeo aet aeu al- ala alb alc ale all alo alt alu aoa aob aoc aoe aol aoo aot aou at- ata atb atc ate atl ato att atu au- aua aub auc aue aul auo aut b-u baa bab bac bae bal bao bat bau bba bbb bbc bbe bbl bbo bbt bbu bca bcb bcc bce bcl bco bct bcu be- bea beb bec bee bel beo bet beu bla blb blc ble bll blo blt blu boa bob boc boe bol boo bot bou bta btb btc bte btl bto btt btu bua bub buc bue bul buo but buu c-- caa cab cac cae cal cao cat cau cba cbb cbc cbe cbl cbo cbt cbu cca ccb ccc cce ccl cco cct ccu ce- cea ceb cec cee cel ceo cet ceu cl- cla clb clc cle cll clo clt clu co- coa cob coc coe col coo cot cou cta ctb ctc cte ctl cto ctt ctu cua cub cuc cue cul cuo cut cuu eaa eab eac eae eal eao eat eau eba ebb ebc ebe ebl ebo ebt ebu ec- eca ecb ecc ece ecl eco ect ecu eea eeb eec eee eel eeo eet ela elb elc ele ell elo elt elu eo- eoa eob eoc eoe eol eoo eot eou eta etb etc ete etl eto ett etu eu- eua eub euc eue eul eut la- laa lab lac lae lal lao lat lau lba lbb lbc lbe lbl lbo lbt lbu lca lcb lcc lce lcl lco lct lcu lea leb lec lee lel leo let leu lla llb llc lle lll llo llt llu loa lob loc loe lol loo lot lou lta ltb ltc lte ltl lto ltt ltu lua lub luc lue lul luo lut luu oaa oab oac oae oal oao oat oau ob- oba obb obc obe obl obo obt obu oc- oca ocb occ ocl oco oct ocu oea oeb oec oee oel oeo oet ola olb olc ole oll olo olt olu oo- ooa oob ooc ool ooo oot ot- ota otb otc ote otl oto ott otu ou- oua ouc oue oul ouo out taa tab tac tae tal tao tat tau tba tbb tbc tbe tbl tbo tbt tbu tca tcb tcc tce tcl tco tct tcu te- tea teb tec tee tel teo tet teu tla tlc tle tll tlo tlt tlu to- toa tob toc toe tol too tot tou tta ttb ttc tte ttl tto ttt ttu tua tub tuc tue tul tuo tut tuu ua- uaa uab uac uae ual uao uat uau uba ubb ubc ube ubl ubo ubt ubu uca ucb ucc uce ucl uco uct ucu uea ueb uec uee uel uet ula ulb ulc ule ull ulo ult ulu uoa uob uoc uoe uol uoo uot uta utb utc ute utl uto utt utu uua uuc uue uut uuu