-al -ol a-a a-b a-c aaa aab aac aad aak aal aan aao aar ab- aba abb abc abd abk abl abn abo abr ac- aca acb acc acd ack acl acn aco acr ad- ada adb adc add adk adl adn ado adr aka akb akc akd akk akl akn ako akr al- ala alb alc ald alk all aln alo alr an- ana anb anc and ank anl ann ano anr aoa aob aoc aod aok aol aon aoo aor ar- ara arb arc ard ark arl arn aro arr baa bab bac bad bak bal ban bao bar bba bbb bbc bbd bbk bbl bbn bbo bbr bca bcb bcc bcd bck bcl bcn bco bcr bda bdb bdc bdd bdk bdl bdo bdr bka bkb bkc bkk bkl bkn bko bkr bla blb blc bld blk bll bln blo blr bna bnb bnc bnd bnk bnl bnn bno bnr boa bob boc bod bok bol bon boo bor bra brb brd brk brl brn bro brr c-- caa cab cac cad cak cal can cao car cba cbb cbc cbd cbk cbl cbn cbo cbr cca ccb ccc ccd cck ccl ccn cco ccr cda cdb cdc cdd cdk cdl cdn cdo cdr cka ckb ckc ckd cko cl- cla clb clc cld clk cll cln clo clr cn- cna cnb cnc cnd cnl cnn cno cnr co- coa cob coc cod cok col con coo cor cra crb crc crd crk crl crn cro crr daa dab dac dad dak dal dan dao dar dba dbb dbc dbd dbk dbl dbn dbo dbr dca dcb dcc dcd dck dcl dcn dco dcr dda ddb ddc ddd ddk ddl ddn ddo ddr dka dkb dkc dkk dkl dko dkr dl- dla dlb dlc dld dlk dll dlo dlr dna dnb dnc dnd dnk dnl dnn dno dnr doa dob doc dod dok dol don doo dor dra drb drc drd drk drl drn dro drr ka- kaa kab kac kad kak kal kan kao kar kba kbb kbc kbd kbk kbl kbn kbo kbr kca kcb kcc kcd kck kcl kcn kcr kda kdb kdc kdk kdl kdo kdr kkb kkc kkk kkl kkn kkr kl- kla klb klc kld klo klr kn- kna knc knd knk knl knn kno knr koa kob koc kod kok kol kon koo kor kra krc krd krk krl krn kro krr la- laa lab lac lad lak lal lan lao lar lba lbb lbc lbd lbk lbl lbo lbr lca lcb lcc lcd lck lcl lcn lco lcr lda ldb ldc ldd ldk ldl ldn ldo ldr lka lkb lkl lkr lla llb llc lld llk lll lln llo llr lna lnb lnc lnd lnk lnl lnn lno lnr loa lob loc lod lok lol lon loo lor lra lrb lrc lrd lrk lrn lro lrr naa nab nac nad nak nal nan nao nar nba nbb nbc nbd nbk nbl nbn nbo nbr nca ncb ncc ncd nck ncl ncn nco ncr nda ndb ndc ndd ndk ndl ndn ndo ndr nka nkc nkk nkn nko nkr nla nlb nlc nld nlk nll nln nlo nlr nna nnb nnc nnk nnl nnn nno no- noa nob noc nod nok nol non noo nor nra nrb nrc nrd nrk nrl nrn nro nrr oaa oab oac oad oak oal oan oao oar ob- oba obb obc obd obk obl obn obo obr oc- oca ocb occ ocd ock ocl ocn oco ocr oda odb odc odd odl odn odo odr oka okb okc okd okk okl oko okr ola olb olc old olk oll oln olo on- ona onb onc ond onk onl onn ono onr oo- ooa oob ooc ood ook ool oon ooo oor or- ora orb orc ord ork orl orn oro orr ra- raa rab rac rad rak ral ran rao rar rba rbb rbc rbd rbk rbl rbn rbo rbr rca rcb rcc rcd rcl rcn rco rcr rda rdb rdc rdd rdl rdn rdo rdr rkb rkc rkk rko rla rlc rld rll rln rlo rlr rna rnb rnc rnd rnn rno rnr roa rob roc rod rok rol ron roo ror rra rrb rrc rrd rrk rrl rrn rrr

-ana a-ak a-do a-ok aaaa aaab aaac aaad aaal aaan aaar aaba aabb aabc aabd aabl aaca aacb aacc aacd aack aacl aacn aaco aacr aada aadc aaka aala aalc aald aall aalo aana aand aaon aaoo aara aarc aard aaro abaa abab abac abad abak abal aban abar abb- abba abbb abbo abbr abca abcb abcc abcd abcl abcn abcr abda abdo abla ablo aboa abob abod abok abol abon aboo abor abra abrc abro acaa acab acac acad acan acar acba acbl acca accc accd acco acda acdb acdc ackd acla aclc aclr acoa acod acol acon acor acr- acra acrc acro acrr adaa adab adac adad adak adal adan adao adar adba adbc adcc adda addc addd addl addn addo addr adna adob adoc adod adok adon adoo ador adra adro akaa akal akan akao akar akca akdn akka akko aklo akna akok akon akr- akra alaa alac alad alak alal alan alao alar alb- alba albc albo alca alcc alco ald- alda aldl aldo alk- alka alkb alkd alko all- alla alll alln allo allr alna aloa aloc alod alok alol alon aloo alor alro ana- anaa anab anac anad anak anal anan anao anar anba anbb anbl anbo anca ancc anco and- anda andl ando andr ank- anka anko anla anlc anln anlo anna annb anno ano- anoa anod anon anor anrc aoba aoca aola aonb aono aora aorb aorn arab arac arad arak aral aran arar arba arc- arca arco arda ardc ardl ardo arka arko arla arlo arna arnd arnk arno aroa arob arod aron aroo aror arr- arra arrc arrk arro arrr baaa baad baak baal baan baar baba babb babo babr bac- baca bacc back bacn baco bada badb badd bado badr bak- baka