-al -ol a-a a-b a-c aaa aab aac aak aal aao aar ab- aba abb abc abk abl abo abr ac- aca acb acc ack acl aco acr aka akb akc akk akl ako akr al- ala alb alc alk all alo alr aoa aob aoc aok aol aoo aor ar- ara arb arc ark arl aro arr baa bab bac bak bal bao bar bba bbb bbc bbk bbl bbo bbr bca bcb bcc bck bcl bco bcr bka bkb bkc bkk bkl bko bkr bla blb blc blk bll blo blr boa bob boc bok bol boo bor bra brb brk brl bro brr c-- caa cab cac cak cal cao car cba cbb cbc cbk cbl cbo cbr cca ccb ccc cck ccl cco ccr cka ckb ckc cko cl- cla clb clc clk cll clo clr co- coa cob coc cok col coo cor cra crb crc crk crl cro crr ka- kaa kab kac kak kal kao kar kba kbb kbc kbk kbl kbo kbr kca kcb kcc kck kcl kcr kkb kkc kkk kkl kkr kl- kla klb klc klo klr koa kob koc kok kol koo kor kra krc krk krl kro krr la- laa lab lac lak lal lao lar lba lbb lbc lbk lbl lbo lbr lca lcb lcc lck lcl lco lcr lka lkb lkl lkr lla llb llc llk lll llo llr loa lob loc lok lol loo lor lra lrb lrc lrk lro lrr oaa oab oac oak oal oao oar ob- oba obb obc obk obl obo obr oc- oca ocb occ ock ocl oco ocr oka okb okc okk okl oko okr ola olb olc olk oll olo oo- ooa oob ooc ook ool ooo oor or- ora orb orc ork orl oro orr ra- raa rab rac rak ral rao rar rba rbb rbc rbk rbl rbo rbr rca rcb rcc rcl rco rcr rkb rkc rkk rko rla rlc rll rlo rlr roa rob roc rok rol roo ror rra rrb rrc rrk rrl rrr

a-ak a-ok aaaa aaab aaac aaal aaar aaba aabb aabc aabl aaca aacb aacc aack aacl aaco aacr aaka aala aalc aall aalo aaoo aara aarc aaro abaa abab abac abak abal abar abb- abba abbb abbo abbr abca abcb abcc abcl abcr abla ablo aboa abob abok abol aboo abor abra abrc abro acaa acab acac acar acba acbl acca accc acco acla aclc aclr acoa acol acor acr- acra acrc acro acrr akaa akal akao akar akca akka akko aklo akok akr- akra alaa alac alak alal alao alar alb- alba albc albo alca alcc alco alk- alka alkb alko all- alla alll allo allr aloa aloc alok alol aloo alor alro aoba aoca aola aora aorb arab arac arak aral arar arba arc- arca arco arka arko arla arlo aroa arob aroo aror arr- arra arrc arrk arro arrr baaa baak baal baar baba babb babo babr bac- baca bacc back baco bak- baka bakl bako bakr bala balc balk ball balo baol bar- bara barb barc bark baro barr bbbb bblb bbrc bcaa bcar bcbc bcca bccc bccl bcor bcra blaa blab blac blak blkb blob bloc blok bloo blrc boab boac boak boal boar boba bobb bobo boca bock boco boka boko bola bolk boll bolo boob booc book bool boor bor- bora bork boro borr brab brac brak brao brca brcb brka brkb broa brob broc brok brol broo bror brrr c-bo caaa caab caac caal caba cabo cac- caca cacc cack caco cacr caka cala calc calk call calo caol caor cara carb carc cark carl caro carr cbac cbal cbar cbbc cbca cbcc cbcl cbcr cbka cbkl cbko cbkr cblb cblc cbol cbrl ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccl ccla cclc ccob ccoc ccra ccrc ccrl ckac ckbc ckck ckcl ckco ckoa ckob ckoc ckoo ckor ckrc clab clar clob clok cloo clor clra clro coak coal coba cobb cobo coca cock coco cok- coka coko col- cola colb colk coll colo coob cook cool cor- cora corb corc cork corl coro corr crab crac crar crbc crca crcc crcr crkc crkl crob croc crok crol croo cror k-lo kaaa kaab kaak kaal kaar kaba kabb kabc kabo kabr kacb kacc kacl kaco kaka kakc kakk kako kala kalb kalc kalk kall kalo kaoa kaoc kaok kaol kaor kara karb kark karl karo karr kbaa kbab kbac kbak kbal kbar kbba kbbb kbbc kbbk kbbl kbbo kbbr kbca kbcb kbck kbcl kbco kbcr kbkb kbkk kbkl kbko kbkr kbla kblb kbll kblo kblr kboa kbob kboc kbok kboo kbra kbrb kbrc kbrk kbrl kbro kcaa kcab kcac kcal kcar kcba kcbc kcbk kcbl kcbr kcca kccb kccc kcck kccl kccr kckc kckk kckl kcko kckr kcla kclc kclk kcll kclr kcob kcol kcor kcrc kcro kcrr kkaa kkac kkal kkar kkba kkbb kkbl kkbo kkbr kkcb kkck kkcl kkco kkcr kkkk kklb kklc kkll kklo kkoa kkob kkol kkoo kkor kkrb kkrc kkrk kkrl kkro kkrr klaa klab klac klak klal klar klbb klbc klbl klca klcb klcc klck klcl klcr klka klkc klkk klkl klko klkr klla kllb kllc kllk kloa klob kloc klok klol kloo klor klrc klrk klrr koab koac koak koal koar koba kobb kobc kobk kobo kobr koca kocb kock koka kokb kokc kokk koko kokr kola kolb kolc kolk koll kolo kolr koob kooc kook kool kooo koor kora korb korc kork korl koro korr krab krac krak kral krar krba krbb krbk krbl krbr krca krcb krcc krcl krco krka krkc krkk krko krkr krla krlc kroa krob kroc krok krol kroo kror krrb krrc krrk krrl krro krrr laaa laac laak laal laar laba labo labr laca lacc lack lacl laco laka lala lall lalo lara larb larc lark larr lbar lbcc lblr lcac lcbc lcca lccc lcor lcra lcrl lkab lkal llao llcc lllc llll lloa lloc lloo loac loar lob- loba lobb lobo loca locc lock loco