-al -ol a-a a-b a-c aaa aab aac aad aak aal aao aar ab- aba abb abc abd abk abl abo abr ac- aca acb acc acd ack acl aco acr ad- ada adb adc add adk adl ado adr aka akb akc akd akk akl ako akr al- ala alb alc ald alk all alo alr aoa aob aoc aod aok aol aoo aor ar- ara arb arc ard ark arl aro arr baa bab bac bad bak bal bao bar bba bbb bbc bbd bbk bbl bbo bbr bca bcb bcc bcd bck bcl bco bcr bda bdb bdc bdd bdk bdl bdo bdr bka bkb bkc bkk bkl bko bkr bla blb blc bld blk bll blo blr boa bob boc bod bok bol boo bor bra brb brd brk brl bro brr c-- caa cab cac cad cak cal cao car cba cbb cbc cbd cbk cbl cbo cbr cca ccb ccc ccd cck ccl cco ccr cda cdb cdc cdd cdk cdl cdo cdr cka ckb ckc ckd cko cl- cla clb clc cld clk cll clo clr co- coa cob coc cod cok col coo cor cra crb crc crd crk crl cro crr daa dab dac dad dak dal dao dar dba dbb dbc dbd dbk dbl dbo dbr dca dcb dcc dcd dck dcl dco dcr dda ddb ddc ddd ddk ddl ddo ddr dka dkb dkc dkk dkl dko dkr dl- dla dlb dlc dld dlk dll dlo dlr doa dob doc dod dok dol doo dor dra drb drc drd drk drl dro drr ka- kaa kab kac kad kak kal kao kar kba kbb kbc kbd kbk kbl kbo kbr kca kcb kcc kcd kck kcl kcr kda kdb kdc kdk kdl kdo kdr kkb kkc kkk kkl kkr kl- kla klb klc kld klo klr koa kob koc kod kok kol koo kor kra krc krd krk krl kro krr la- laa lab lac lad lak lal lao lar lba lbb lbc lbd lbk lbl lbo lbr lca lcb lcc lcd lck lcl lco lcr lda ldb ldc ldd ldk ldl ldo ldr lka lkb lkl lkr lla llb llc lld llk lll llo llr loa lob loc lod lok lol loo lor lra lrb lrc lrd lrk lro lrr oaa oab oac oad oak oal oao oar ob- oba obb obc obd obk obl obo obr oc- oca ocb occ ocd ock ocl oco ocr oda odb odc odd odl odo odr oka okb okc okd okk okl oko okr ola olb olc old olk oll olo oo- ooa oob ooc ood ook ool ooo oor or- ora orb orc ord ork orl oro orr ra- raa rab rac rad rak ral rao rar rba rbb rbc rbd rbk rbl rbo rbr rca rcb rcc rcd rcl rco rcr rda rdb rdc rdd rdl rdo rdr rkb rkc rkk rko rla rlc rld rll rlo rlr roa rob roc rod rok rol roo ror rra rrb rrc rrd rrk rrl rrr

a-ak a-do a-ok aaaa aaab aaac aaad aaal aaar aaba aabb aabc aabd aabl aaca aacb aacc aacd aack aacl aaco aacr aada aadc aaka aala aalc aald aall aalo aaoo aara aarc aard aaro abaa abab abac abad abak abal abar abb- abba abbb abbo abbr abca abcb abcc abcd abcl abcr abda abdo abla ablo aboa abob abod abok abol aboo abor abra abrc abro acaa acab acac acad acar acba acbl acca accc accd acco acda acdb acdc ackd acla aclc aclr acoa acod acol acor acr- acra acrc acro acrr adaa adab adac adad adak adal adao adar adba adbc adcc adda addc addd addl addo addr adob adoc adod adok adoo ador adra adro akaa akal akao akar akca akka akko aklo akok akr- akra alaa alac alad alak alal alao alar alb- alba albc albo alca alcc alco ald- alda aldl aldo alk- alka alkb alkd alko all- alla alll allo allr aloa aloc alod alok alol aloo alor alro aoba aoca aola aora aorb arab arac arad arak aral arar arba arc- arca arco arda ardc ardl ardo arka arko arla arlo aroa arob arod aroo aror arr- arra arrc arrk arro arrr baaa baad baak baal baar baba babb babo babr bac- baca bacc back baco bada badb badd bado badr bak- baka bakl bako bakr bala balc bald balk ball balo baol bar- bara barb barc bard bark baro barr bbad bbbb bbdd bbdo bblb bbrc bcaa bcar bcbc bcca bccc bccl bcda bcor bcra bd-r bdbc bddc blaa blab blac blad blak bldc bldr blkb blkd blob bloc blod blok bloo blrc boab boac boad boak boal boar boba bobb bobo boca bock boco boda bodb bodo boka boko bola bold bolk boll bolo boob booc bood book bool boor bor- bora bord bork boro borr brab brac brad brak brao brca brcb brda brdo brka brkb broa brob broc brod brok brol broo bror brrr c-bo c-cd caaa caab caac caal caba cabo cac- caca cacc cack caco cacr cada cadc cadd cado cadr caka cala calc cald calk call calo caod caol caor cara carb carc card cark carl caro carr cbac cbal cbar cbbc cbca cbcc cbcl cbcr cbdb cbdc cbdo cbka cbkl cbko cbkr cblb cblc cbol cbrd cbrl ccaa ccab ccac ccad ccar ccba ccbc ccca cccb cccc cccl ccdc ccdr ccla cclc ccob ccoc ccod ccra ccrc ccrl cd-r cdaa cdac cdad cdba cdda cddb cddl cddr ckac ckbc ckck ckcl ckco ckdo ckoa ckob ckoc ckoo ckor ckrc ckrd clab clad clar clcd cldc cldr clob clod clok cloo clor clra clrd clro coad coak coal coba cobb cobo coca cock coco coda codd codl cok- coka coko col- cola colb cold colk coll colo coob cood cook cool cor- cora corb corc cord cork corl coro corr crab crac crar crbc crca crcc crcr crda crdc crkc crkl crob croc crod crok crol croo cror d-bo daab daad