-al -ol a-a a-b a-c aaa aab aac aad aaf aak aal aao ab- aba abb abc abd abf abk abl abo ac- aca acb acc acd acf ack acl aco ad- ada adb adc add adf adk adl ado af- afa afb afc afd aff afk afl afo aka akb akc akd akk akl ako al- ala alb alc ald alf alk all alo aoa aob aoc aod aof aok aol aoo baa bab bac bad baf bak bal bao bba bbb bbc bbd bbf bbk bbl bbo bca bcb bcc bcd bcf bck bcl bco bda bdb bdc bdd bdf bdk bdl bdo bfa bfb bfc bfd bff bfl bfo bka bkb bkc bkf bkk bkl bko bla blb blc bld blf blk bll blo boa bob boc bod bof bok bol boo c-- caa cab cac cad caf cak cal cao cba cbb cbc cbd cbf cbk cbl cbo cca ccb ccc ccd ccf cck ccl cco cda cdb cdc cdd cdf cdk cdl cdo cfa cfb cfc cfd cff cfk cfl cfo cka ckb ckc ckd cko cl- cla clb clc cld clf clk cll clo co- coa cob coc cod cof cok col coo daa dab dac dad daf dak dal dao dba dbb dbc dbd dbf dbk dbl dbo dca dcb dcc dcd dcf dck dcl dco dda ddb ddc ddd ddf ddk ddl ddo dfa dfb dfc dfd dff dfk dfl dfo dka dkb dkc dkk dkl dko dl- dla dlb dlc dld dlf dlk dll dlo doa dob doc dod dof dok dol doo faa fab fac fad faf fak fal fao fba fbb fbc fbd fbf fbk fbl fbo fca fcb fcc fcd fcf fck fcl fco fda fdb fdc fdd fdf fdk fdl fdo ffa ffc ffd fff ffk ffl ffo fka fkb fkc fkf fkk fkl fla flb flc fld flf fll flo foa fob foc fof fok fol foo ka- kaa kab kac kad kaf kak kal kao kba kbb kbc kbd kbf kbk kbl kbo kca kcb kcc kcd kck kcl kda kdb kdc kdf kdk kdl kdo kfa kfc kfd kff kfo kkb kkc kkk kkl kl- kla klb klc kld klf klo koa kob koc kod kof kok kol koo la- laa lab lac lad laf lak lal lao lba lbb lbc lbd lbf lbk lbl lbo lca lcb lcc lcd lcf lck lcl lco lda ldb ldc ldd ldf ldk ldl ldo lfa lfb lfc lfd lff lfk lfl lfo lka lkb lkl lla llb llc lld llf llk lll llo loa lob loc lod lof lok lol loo oaa oab oac oad oaf oak oal oao ob- oba obb obc obd obf obk obl obo oc- oca ocb occ ocd ocf ock ocl oco oda odb odc odd odf odl odo of- ofa ofb ofc ofd off ofl ofo oka okb okc okd okk okl oko ola olb olc old olf olk oll olo oo- ooa oob ooc ood oof ook ool ooo

a-ak a-do a-ok aaaa aaab aaac aaad aaaf aaal aaba aabb aabc aabd aabl aaca aacb aacc aacd aacf aack aacl aaco aada aadc aafa aafb aafc aafd aaff aafl aaka aala aalc aald aall aalo aaoo abaa abab abac abad abaf abak abal abb- abba abbb abbo abca abcb abcc abcd abcf abcl abda abdo abff abla ablo aboa abob abod abof abok abol aboo acaa acab acac acad acba acbl acca accc accd accf acco acda acdb acdc acdf acfc acfd acfl ackd acla aclc acoa acod acol adaa adab adac adad adak adal adao adba adbc adcc adda addc addd addl addo adfa adfc adfl adob adoc adod adok adoo afaa afad afak afao afca afcb afcc afdb afdc afdl affa affc affo afka afla aflc afoa afol afoo akaa akal akao akca akka akko aklo akok alaa alac alad alak alal alao alb- alba albc albo alca alcc alco ald- alda aldl aldo alfa alk- alka alkb alkd alko all- alla alll allo aloa aloc alod alof alok alol aloo aoba aoca aola baaa baad baaf baak baal baba babb babo bac- baca bacc back baco bada badb badd bado bafc baff bafo bak- baka bakl bako bala balc bald balf balk ball balo baol bbad bbbb bbdd bbdo bbfc bblb bcaa bcbc bcca bccc bccl bcda bcfc bcof bdbc bddc bfca bffl blaa blab blac blad blak bldc blfc blkb blkd blob bloc blod blok bloo boab boac boad boak boal boba bobb bobo boca bock boco boda bodb bodo bofa bofd boff boka boko bola bold bolk boll bolo boob booc bood boof book bool c-bo c-cd caaa caab caac caaf caal caba cabf cabo cac- caca cacc cack caco cada cadc cadd cado cafa cafb cafc caff cafl caka cala calc cald calf calk call calo caod caol cbac cbal cbbc cbca cbcc cbcl cbdb cbdc cbdo cbfb cbfc cbka cbkl cbko cblb cblc cbol ccaa ccab ccac ccad ccaf ccba ccbc ccca cccb cccc cccf cccl ccdc ccdf ccfa ccfc ccfd ccff ccfl ccla cclc ccob ccoc ccod cdaa cdac cdad cdba cdbf cdda cddb cddl cdfa cfaa cfab cfac cfao cfbc cfca cfcb cfcf cfcl cfco cfda cffb cfoa ckac ckbc ckck ckcl ckco ckdo cklf ckoa ckob ckoc ckoo clab clad claf clcd cldc clob clod clof clok cloo coad coak coal coba cobb cobo coca cock coco coda codd codl cofc coff cok- coka coko col- cola colb cold colk coll colo coob cood coof cook cool d-bo daab daad daal daba dabb dabo daca dada dado dafa dafc daff dafo daka dako dala dalf dalk dall dalo dbcc dbfc dbfo dcbc dcca dccb dccc dccl dcdb dcfc dddd ddlc ddoc dfaf dfcc dfco dffa dkba dkdc dlab dlbd dlco doab doak doal doba dobb dobl doca dock doco dod- doda dodd dodo doff doka doko dola dold dolf dolk doll dolo doob dood doof dook dool f--k faaa faac faad faba fabd fabo faca facc fack fada fadd