-al a-a a-b a-c aaa aab aac aad aae aaf aal aau ab- aba abb abc abd abe abf abl abu ac- aca acb acc acd ace acf acl acu ad- ada adb adc add ade adf adl adu aea aeb aec aed aee aef ael aeu af- afa afb afc afd afe aff afl afu al- ala alb alc ald ale alf all alu au- aua aub auc aud aue auf aul b-u baa bab bac bad bae baf bal bau bba bbb bbc bbd bbe bbf bbl bbu bca bcb bcc bcd bce bcf bcl bcu bda bdb bdc bdd bde bdf bdl bdu be- bea beb bec bed bee bef bel beu bfa bfb bfc bfd bfe bff bfl bfu bla blb blc bld ble blf bll blu bua bub buc bud bue buf bul buu c-- caa cab cac cad cae caf cal cau cba cbb cbc cbd cbe cbf cbl cbu cca ccb ccc ccd cce ccf ccl ccu cda cdb cdc cdd cde cdf cdl cdu ce- cea ceb cec ced cee cef cel ceu cfa cfb cfc cfd cfe cff cfl cfu cl- cla clb clc cld cle clf cll clu cua cub cuc cud cue cuf cul cuu daa dab dac dad dae daf dal dau dba dbb dbc dbd dbe dbf dbl dbu dca dcb dcc dcd dce dcf dcl dcu dda ddb ddc ddd dde ddf ddl ddu de- dea deb dec ded dee def del deu dfa dfb dfc dfd dfe dff dfl dfu dl- dla dlb dlc dld dle dlf dll dlu dua dub duc dud due duf dul eaa eab eac ead eae eaf eal eau eba ebb ebc ebd ebe ebf ebl ebu ec- eca ecb ecc ecd ece ecf ecl ecu ed- eda edb edc edd ede edf edl edu eea eeb eec eed eee eef eel ef- efa efb efc efd efe eff efl ela elb elc eld ele elf ell elu eu- eua eub euc eud eue euf eul faa fab fac fad fae faf fal fau fba fbb fbc fbd fbe fbf fbl fbu fca fcb fcc fcd fce fcf fcl fcu fda fdb fdc fdd fde fdf fdl fdu fea feb fec fed fee fef fel feu ffa ffc ffd ffe fff ffl ffu fla flb flc fld fle flf fll flu fua fub fud fue fuf ful fuu la- laa lab lac lad lae laf lal lau lba lbb lbc lbd lbe lbf lbl lbu lca lcb lcc lcd lce lcf lcl lcu lda ldb ldc ldd lde ldf ldl ldu lea leb lec led lee lef lel leu lfa lfb lfc lfd lfe lff lfl lfu lla llb llc lld lle llf lll llu lua lub luc lud lue luf lul luu ua- uaa uab uac uad uae uaf ual uau uba ubb ubc ube ubf ubl ubu uca ucb ucc ucd uce ucf ucl ucu uda udb udc udd ude udf udl udu uea ueb uec ued uee uef uel ufa ufc ufd ufe uff ufl ufu ula ulb ulc uld ule ulf ull ulu uua uuc uue uuu

a-be a-fu aaaa aaab aaac aaad aaae aaaf aaal aaba aabb aabc aabd aabl aaca aacb aacc aacd aace aacf aacl aacu aada aadc aade aadu aaea aaec aafa aafb aafc aafd aaff aafl aala aalc aald aale aall aalu abaa abab abac abad abae abaf abal abau abb- abba abbb abbe abca abcb abcc abcd abcf abcl abda abdu abec abed abee abel abff abla able abua abud abue abuf abul acaa acab acac acad acae acba acbl acca accc accd acce accf accu acda acdb acdc acde acdf ace- acea acec aced acel acfc acfd acfe acfl acla aclc acle aclu acu- acue acuf acul adaa adab adac adad adae adal adba adbc adcc adda addc addd adde addl addu adea adeb adee adel adfa adfc adfl adle adua adub adue aeac aeaf aecb aecl aede aela aelc afaa afad afca afcb afcc afcu afdb afdc afdl afee afel affa affc afla aflc afle afua afud afue alaa alac alad alae alal alau alb- alba albc albe albu alca alcc alce ald- alda alde aldl alea alec aled alee alef aleu alfa alfe all- alla alle alll allu alua aluf auaa aube auca auce audc aude auel aufc aufe aul- aula auld aule aulf aull aulu baaa baad baaf baal baba babb babe babu bac- baca bacc bace bada badb badd bade badu baed bael bafc baff bala balc bald bale balf ball balu bau- baud bauf baul bbad bbau bbbb bbdd bbeb bbfc bblb bcaa bcbc bcca bccc bccl bcda bcde bcec bcfc bcuc bdbc bddc bdle bduf bead beaf beal beau beba bebb bebe beca becu beda bede bedl bedu beeb beed beef beel befa befe beff bela beld bele bell belu bfca bffl blaa blab blac blad blae blau blcu bldc blea bleb bled blee bleu blfc blub blud blue bluf buad bual buba bubb bube bubu buca bucc buce bucu buda budb budd bude budl budu buea buel bueu bufc bufe buff bula bulb buld bule bull bulu c-cd caaa caab caac caaf caal caba cabe cabf cabu cac- caca cacc cace cada cadc cadd cade cadu caec caeu cafa cafb cafc cafe caff cafl cafu cala calc cald cale calf call calu cauc cauf caul cbac cbal cbbc cbca cbcc cbce cbcl cbcu cbdb cbdc cbea cbec cbee cbef cbfb cbfc cblb cblc ccaa ccab ccac ccad ccaf ccba ccbc ccca cccb cccc cccf cccl cccu ccdc ccdf cced ccee ccel ccfa ccfc ccfd ccff ccfl ccla cclc ccuc cd-e cdaa cdac cdad cdba cdbf cdda cddb cddl cdec cdef cdfa cdfe ceac cead ceal ceba cebu cec- ceca cece ceda cedd cede cedu ceeb ceec ceel cef- cefa cefc cel- cela celc cele celf cell cfaa cfab cfac cfae cfbc cfca cfcb cfcf cfcl cfda cffb clab clad claf clau clcd cldc clea clec cled clee clef cleu club clud clue