-al a-a a-b a-c aaa aab aac aad aae aaf aak aal ab- aba abb abc abd abe abf abk abl ac- aca acb acc acd ace acf ack acl ad- ada adb adc add ade adf adk adl aea aeb aec aed aee aef aek ael af- afa afb afc afd afe aff afk afl aka akb akc akd ake akk akl al- ala alb alc ald ale alf alk all baa bab bac bad bae baf bak bal bba bbb bbc bbd bbe bbf bbk bbl bca bcb bcc bcd bce bcf bck bcl bda bdb bdc bdd bde bdf bdk bdl be- bea beb bec bed bee bef bek bel bfa bfb bfc bfd bfe bff bfl bka bkb bkc bke bkf bkk bkl bla blb blc bld ble blf blk bll c-- caa cab cac cad cae caf cak cal cba cbb cbc cbd cbe cbf cbk cbl cca ccb ccc ccd cce ccf cck ccl cda cdb cdc cdd cde cdf cdk cdl ce- cea ceb cec ced cee cef cek cel cfa cfb cfc cfd cfe cff cfk cfl cka ckb ckc ckd cl- cla clb clc cld cle clf clk cll daa dab dac dad dae daf dak dal dba dbb dbc dbd dbe dbf dbk dbl dca dcb dcc dcd dce dcf dck dcl dda ddb ddc ddd dde ddf ddk ddl de- dea deb dec ded dee def dek del dfa dfb dfc dfd dfe dff dfk dfl dka dkb dkc dke dkk dkl dl- dla dlb dlc dld dle dlf dlk dll eaa eab eac ead eae eaf eak eal eba ebb ebc ebd ebe ebf ebk ebl ec- eca ecb ecc ecd ece ecf eck ecl ed- eda edb edc edd ede edf edk edl eea eeb eec eed eee eef eek eel ef- efa efb efc efd efe eff efl eka ekb ekc ekd eke ekf ekl ela elb elc eld ele elf elk ell faa fab fac fad fae faf fak fal fba fbb fbc fbd fbe fbf fbk fbl fca fcb fcc fcd fce fcf fck fcl fda fdb fdc fdd fde fdf fdk fdl fea feb fec fed fee fef fek fel ffa ffc ffd ffe fff ffk ffl fka fkb fkc fkf fkk fkl fla flb flc fld fle flf fll ka- kaa kab kac kad kae kaf kak kal kba kbb kbc kbd kbe kbf kbk kbl kca kcb kcc kcd kce kck kcl kda kdb kdc kde kdf kdk kdl ke- kea keb kec ked kee kef kek kel kfa kfc kfd kff kkb kkc kke kkk kkl kl- kla klb klc kld klf la- laa lab lac lad lae laf lak lal lba lbb lbc lbd lbe lbf lbk lbl lca lcb lcc lcd lce lcf lck lcl lda ldb ldc ldd lde ldf ldk ldl lea leb lec led lee lef lek lel lfa lfb lfc lfd lfe lff lfk lfl lka lkb lkl lla llb llc lld lle llf llk lll

a-ak a-be aaaa aaab aaac aaad aaae aaaf aaal aaba aabb aabc aabd aabl aaca aacb aacc aacd aace aacf aack aacl aada aadc aade aaea aaec aafa aafb aafc aafd aaff aafl aaka aake aala aalc aald aale aall abaa abab abac abad abae abaf abak abal abb- abba abbb abbe abca abcb abcc abcd abcf abcl abda abec abed abee abel abff abla able acaa acab acac acad acae acba acbl acca accc accd acce accf acda acdb acdc acde acdf ace- acea acec aced acek acel acfc acfd acfe acfl ackd acke acla aclc acle adaa adab adac adad adae adak adal adba adbc adcc adda addc addd adde addl adea adeb adee adel adfa adfc adfl adle aeac aeaf aecb aecl aede aeka aela aelc afaa afad afak afca afcb afcc afdb afdc afdl afee afek afel affa affc afka afla aflc afle akaa akae akal akca aked akee akel akka akle alaa alac alad alae alak alal alb- alba albc albe alca alcc alce ald- alda alde aldl alea alec aled alee alef alek alfa alfe alk- alka alkb alkd alke all- alla alle alll baaa baad baaf baak baal baba babb babe bac- baca bacc bace back bada badb badd bade baed baek bael bafc baff bak- baka bake bakl bala balc bald bale balf balk ball bbad bbbb bbdd bbeb bbfc bblb bcaa bcbc bcca bccc bccl bcda bcde bcec bcfc bdbc bddc bdle bead beaf beak beal beba bebb bebe beca beck beda bede bedl beeb beed beef beek beel befa befe beff beka beke bela beld bele belk bell bfca bffl blaa blab blac blad blae blak bldc blea bleb bled blee blek blfc blkb blkd c-cd caaa caab caac caaf caal caba cabe cabf cac- caca cacc cace cack cada cadc cadd cade caec cafa cafb cafc cafe caff cafl caka cake cala calc cald cale calf calk call cbac cbal cbbc cbca cbcc cbce cbcl cbdb cbdc cbea cbec cbee cbef cbfb cbfc cbka cbkl cblb cblc ccaa ccab ccac ccad ccaf ccba ccbc ccca cccb cccc cccf cccl ccdc ccdf cced ccee ccel ccfa ccfc ccfd ccff ccfl ccla cclc cd-e cdaa cdac cdad cdba cdbf cdda cddb cddl cdec cdef cdfa cdfe ceac cead ceal ceba cec- ceca cece ceda cedd cede ceeb ceec ceel cef- cefa cefc ceke cel- cela celc cele celf cell cfaa cfab cfac cfae cfbc cfca cfcb cfcf cfcl cfda cffb ckac ckbc ckbe ckck ckcl cklf clab clad claf clcd cldc clea clec cled clee clef clek daab daad daae daal daba dabb daca dace dada dade daeb dafa dafc dafe daff daka dake dala dale dalf dalk dall dbcc dbfc dcbc dcca dccb dccc dccl dcdb dcfc dddd ddlc deac dead deae deaf deak deal deba debe dec- deca decc decd dece deck decl deda dedd dede deeb deed deef deek deel defe deff dek- deka deke dela deld dele delf delk dell dfaf dfcc dffa dkba dkdc