-al -er -ol a-a a-b a-c a-t aaa aab aac aae aaf aal aao aar aat aau ab- aba abb abc abe abf abl abo abr abt abu ac- aca acb acc ace acf acl aco acr act acu aea aeb aec aee aef ael aeo aer aet aeu af- afa afb afc afe aff afl afo afr aft afu al- ala alb alc ale alf all alo alr alt alu aoa aob aoc aoe aof aol aoo aor aot aou ar- ara arb arc are arf arl aro arr art aru at- ata atb atc ate atf atl ato atr att atu au- aua aub auc aue auf aul auo aur aut b-u baa bab bac bae baf bal bao bar bat bau bba bbb bbc bbe bbf bbl bbo bbr bbt bbu bca bcb bcc bce bcf bcl bco bcr bct bcu be- bea beb bec bee bef bel beo ber bet beu bfa bfb bfc bfe bff bfl bfo bfr bft bfu bla blb blc ble blf bll blo blr blt blu boa bob boc boe bof bol boo bor bot bou bra brb bre brf brl bro brr brt bru bta btb btc bte btf btl bto btr btt btu bua bub buc bue buf bul buo bur but buu c-- caa cab cac cae caf cal cao car cat cau cba cbb cbc cbe cbf cbl cbo cbr cbt cbu cca ccb ccc cce ccf ccl cco ccr cct ccu ce- cea ceb cec cee cef cel ceo cer cet ceu cfa cfb cfc cfe cff cfl cfo cfr cft cfu cl- cla clb clc cle clf cll clo clr clt clu co- coa cob coc coe cof col coo cor cot cou cra crb crc cre crf crl cro crr crt cru cta ctb ctc cte ctf ctl cto ctr ctt ctu cua cub cuc cue cuf cul cuo cur cut cuu eaa eab eac eae eaf eal eao ear eat eau eba ebb ebc ebe ebf ebl ebo ebr ebt ebu ec- eca ecb ecc ece ecf ecl eco ecr ect ecu eea eeb eec eee eef eel eeo eer eet ef- efa efb efc efe eff efl efo efr eft ela elb elc ele elf ell elo elr elt elu eo- eoa eob eoc eoe eof eol eoo eor eot eou era erb erc ere erf erl ero err ert eru eta etb etc ete etf etl eto etr ett etu eu- eua eub euc eue euf eul eur eut faa fab fac fae faf fal fao far fat fau fba fbb fbc fbe fbf fbl fbo fbr fbt fbu fca fcb fcc fce fcf fcl fco fcr fct fcu fea feb fec fee fef fel feo fer fet feu ffa ffc ffe fff ffl ffo ffr fft ffu fla flb flc fle flf fll flo flr flt flu foa fob foc foe fof fol foo for fot fou fra frb frc fre frf frl fro frr frt fru fta ftb ftc fte ftf ftl fto ftr ftt ftu fua fub fue fuf ful fuo fur fut fuu la- laa lab lac lae laf lal lao lar lat lau lba lbb lbc lbe lbf lbl lbo lbr lbt lbu lca lcb lcc lce lcf lcl lco lcr lct lcu lea leb lec lee lef lel leo ler let leu lfa lfb lfc lfe lff lfl lfo lfr lft lfu lla llb llc lle llf lll llo llr llt llu loa lob loc loe lof lol loo lor lot lou lra lrb lrc lrf lro lrr lrt lru lta ltb ltc lte ltf ltl lto ltr ltt ltu lua lub luc lue luf lul luo lur lut luu oaa oab oac oae oaf oal oao oar oat oau ob- oba obb obc obe obf obl obo obr obt obu oc- oca ocb occ ocf ocl oco ocr oct ocu oea oeb oec oee oef oel oeo oer oet of- ofa ofb ofc ofe off ofl ofo ofr oft ofu ola olb olc ole olf oll olo olt olu oo- ooa oob ooc oof ool ooo oor oot or- ora orb orc ore orf orl oro orr ort oru ot- ota otb otc ote otf otl oto otr ott otu ou- oua ouc oue ouf oul ouo our out ra- raa rab rac rae raf ral rao rar rat rau rba rbb rbc rbe rbf rbl rbo rbr rbt rbu rca rcb rcc rce rcf rcl rco rcr rct rcu re- rea reb rec ree ref rel reo rer ret reu rfa rfb rfc rfe rff rfl rfo rfr rft rfu rla rlc rle rlf rll rlo rlr rlt rlu roa rob roc roe rof rol roo ror rot rou rra rrb rrc rrf rrl rrr rrt rru rta rtb rtc rte rtf rtl rto rtr rtt rtu rua rub ruc rue ruf ruo rur rut ruu taa tab tac tae taf tal tao tar tat tau tba tbb tbc tbe tbf tbl tbo tbr tbt tbu tca tcb tcc tce tcf tcl tco tcr tct tcu te- tea teb tec tee tef tel teo ter tet teu tfa tfb tfc tfe tff tfl tfo tfr tft tfu tla tlc tle tlf tll tlo tlr tlt tlu to- toa tob toc toe tof tol too tor tot tou tra trb trc tre trf trl tro trr trt tru tta ttb ttc tte ttf ttl tto ttr ttt ttu tua tub tuc tue tuf tul tuo tur tut tuu ua- uaa uab uac uae uaf ual uao uar uat uau uba ubb ubc ube ubf ubl ubo ubr ubt ubu uca ucb ucc uce ucf ucl uco ucr uct ucu uea ueb uec uee uef uel uer uet ufa ufc ufe uff ufl ufo ufr uft ufu ula ulb ulc ule ulf ull ulo ulr ult ulu uoa uob uoc uoe uol uoo uor uot ur- ura urb urc ure urf url uro urr urt uru uta utb utc ute utf utl uto utr utt