-al -ol a-a a-b a-c aaa aab aac aal aao aar aau ab- aba abb abc abl abo abr abu ac- aca acb acc acl aco acr acu al- ala alb alc all alo alr alu aoa aob aoc aol aoo aor aou ar- ara arb arc arl aro arr aru au- aua aub auc aul auo aur b-u baa bab bac bal bao bar bau bba bbb bbc bbl bbo bbr bbu bca bcb bcc bcl bco bcr bcu bla blb blc bll blo blr blu boa bob boc bol boo bor bou bra brb brl bro brr bru bua bub buc bul buo bur buu c-- caa cab cac cal cao car cau cba cbb cbc cbl cbo cbr cbu cca ccb ccc ccl cco ccr ccu cl- cla clb clc cll clo clr clu co- coa cob coc col coo cor cou cra crb crc crl cro crr cru cua cub cuc cul cuo cur cuu la- laa lab lac lal lao lar lau lba lbb lbc lbl lbo lbr lbu lca lcb lcc lcl lco lcr lcu lla llb llc lll llo llr llu loa lob loc lol loo lor lou lra lrb lrc lro lrr lru lua lub luc lul luo lur luu oaa oab oac oal oao oar oau ob- oba obb obc obl obo obr obu oc- oca ocb occ ocl oco ocr ocu ola olb olc oll olo olu oo- ooa oob ooc ool ooo oor or- ora orb orc orl oro orr oru ou- oua ouc oul ouo our ra- raa rab rac ral rao rar rau rba rbb rbc rbl rbo rbr rbu rca rcb rcc rcl rco rcr rcu rla rlc rll rlo rlr rlu roa rob roc rol roo ror rou rra rrb rrc rrl rrr rru rua rub ruc ruo rur ruu ua- uaa uab uac ual uao uar uau uba ubb ubc ubl ubo ubr ubu uca ucb ucc ucl uco ucr ucu ula ulb ulc ull ulo ulr ulu uoa uob uoc uol uoo uor ur- ura urb urc url uro urr uru uua uuc uur uuu

aaaa aaab aaac aaal aaar aaba aabb aabc aabl aaca aacb aacc aacl aaco aacr aacu aala aalc aall aalo aalu aaoo aara aarc aaro aaru abaa abab abac abal abar abau abb- abba abbb abbo abbr abca abcb abcc abcl abcr abla ablo aboa abob abol aboo abor abou abra abrc abro abua abul acaa acab acac acar acba acbl acca accc acco accu acla aclc aclr aclu acoa acol acor acou acr- acra acrc acro acrr acu- acul acuo acur alaa alac alal alao alar alau alb- alba albc albo albu alca alcc alco all- alla alll allo allr allu aloa aloc alol aloo alor alou alro alua alur aoba aoca aola aora aorb aoul arab arac aral arar arau arba arc- arca arco arla arlo aroa arob aroo aror arr- arra arrc arro arrr arru arua arub arul auaa auca aul- aula aull aulo aulu auol aur- aura auro baaa baal baar baba babb babo babr babu bac- baca bacc baco bala balc ball balo balu baol bar- bara barb barc baro barr baru bau- baul baur bbau bbbb bblb bbrc bcaa bcar bcbc bcca bccc bccl bcor bcra bcru bcuc blaa blab blac blau blcu blob bloc bloo blou blrc blub blur boab boac boal boar boba bobb bobo bobu boca boco bocu bola boll bolo bolu boob booc bool boor bor- bora boro borr boru boua boul bour brab brac brao brau brca brcb broa brob broc brol broo bror brou brrr bruc bual buar buba bubb bubo bubu buca bucc buco bucu bula bulb bull bulu buol bur- bura burb burl buro burr buru c-bo caaa caab caac caal caba cabo cabu cac- caca cacc caco cacr cala calc call calo calu caol caor cara carb carc carl caro carr cauc caul cauo cbac cbal cbar cbbc cbca cbcc cbcl cbcr cbcu cblb cblc cbol cbrl ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccl cccu ccla cclc ccob ccoc ccra ccrc ccrl ccuc clab clar clau clob cloo clor clou clra clro club coal coba cobb cobo cobu coca coco cocu col- cola colb coll colo colu coob cool cor- cora corb corc corl coro corr coua coub coul cour crab crac crar crau crbc crbu crca crcc crcr crob croc crol croo cror crub cuau cub- cuba cubb cuca cucc cula culb culc cull culo cura curb curl curo curr laaa laac laal laar laba labo labr labu laca lacc lacl laco lacu lala lall lalo lalu laou lara larb larc larr laru laub laul laur lbar lbcc lblr lcac lcbc lcca lccc lcor lcra lcrl llao llcc lllc llll lloa lloc lloo loac loar lob- loba lobb lobo loca locc loco locu lola loll lolo loob looc lool loor lora loro loul lour louu lrac lral lrba lroc lrrc lrrr luau luba luca lula lull lulu lura luua oaau oall oara obal obba obbo obla oblu obol obor obra obro ocab ocac ocal ocbc occa occc oclc ocra ocrl ocro ocrr ocul ocur olac olar olba olbo olca olcc olla ollo olor olur ooaa ooba oocr oola oolo oooo oora orab orac oral orao orar orba orbb orbo orbu orca orco orla orlo orlu oro- oror orra orro orub ouac oucc oula oulu our- oura ouro ouu- raab raba rabb rabl rabo rabu rac- raca racc raco racu rala ralb rall ralo raob raoc raol rara rarb raro raua raub rauc raul rbbb rbbr rbcl rcac rcbc rcbo rccb rccc rlab rlua roab roar rob- roba robb robo robu roca rocc roco rola roll rolo roob rool roor rora rorc roro roru roua roub roul rrrr ruba rubb rubu ruca rula rull rulo rura rurc ruro ruru uabc uaca uaoc uarc uaru uaua ubac ubal ubar ubba ubbo ubla ublo uboc ubra ucal ucar ucbc ucca ucla ucrc ucua ulaa ular ulbc ulcc ulco ulla ullo ullr ulo-