-al -ol a-a a-b a-c aaa aab aac aad aak aal aao aas ab- aba abb abc abd abk abl abo abs ac- aca acb acc acd ack acl aco acs ad- ada adb adc add adk adl ado ads aka akb akc akd akk akl ako aks al- ala alb alc ald alk all alo als aoa aob aoc aod aok aol aoo aos as- asa asb asc asd ask asl aso ass baa bab bac bad bak bal bao bas bba bbb bbc bbd bbk bbl bbo bbs bca bcb bcc bcd bck bcl bco bcs bda bdb bdc bdd bdk bdl bdo bds bka bkb bkc bkk bkl bko bks bla blb blc bld blk bll blo bls boa bob boc bod bok bol boo bos bsa bsb bsc bsd bsk bsl bso bss c-- caa cab cac cad cak cal cao cas cba cbb cbc cbd cbk cbl cbo cbs cca ccb ccc ccd cck ccl cco ccs cda cdb cdc cdd cdk cdl cdo cds cka ckb ckc ckd cko cks cl- cla clb clc cld clk cll clo cls co- coa cob coc cod cok col coo cos csa csb csc csd csk csl cso css daa dab dac dad dak dal dao das dba dbb dbc dbd dbk dbl dbo dbs dca dcb dcc dcd dck dcl dco dcs dda ddb ddc ddd ddk ddl ddo dds dka dkb dkc dkk dkl dko dks dl- dla dlb dlc dld dlk dll dlo dls doa dob doc dod dok dol doo dos dsa dsb dsc dsd dsk dsl dso dss ka- kaa kab kac kad kak kal kao kas kba kbb kbc kbd kbk kbl kbo kbs kca kcb kcc kcd kck kcl kcs kda kdb kdc kdk kdl kdo kds kkb kkc kkk kkl kks kl- kla klb klc kld klo kls koa kob koc kod kok kol koo kos ksa ksb ksc ksd ksk ksl kso kss la- laa lab lac lad lak lal lao las lba lbb lbc lbd lbk lbl lbo lbs lca lcb lcc lcd lck lcl lco lcs lda ldb ldc ldd ldk ldl ldo lds lka lkb lkl lks lla llb llc lld llk lll llo lls loa lob loc lod lok lol loo los lsa lsb lsc lsd lsk lsl lso lss oaa oab oac oad oak oal oao oas ob- oba obb obc obd obk obl obo obs oc- oca ocb occ ocd ock ocl oco ocs oda odb odc odd odl odo ods oka okb okc okd okk okl oko oks ola olb olc old olk oll olo ols oo- ooa oob ooc ood ook ool ooo oos os- osa osb osc osd osk osl oso oss saa sab sac sad sak sal sao sas sba sbb sbc sbd sbk sbl sbo sbs sca scb scc scd sck scl sco scs sda sdb sdc sdd sdk sdl sdo sds sk- ska skb skc skd skk skl sko sks sla slb slc sld slk sll slo sls soa sob soc sod sok sol soo sos ss- ssa ssb ssc ssd ssk ssl sso sss

a-ak a-do a-ok aaaa aaab aaac aaad aaal aaas aaba aabb aabc aabd aabl aaca aacb aacc aacd aack aacl aaco aacs aada aadc aads aaka aala aalc aald aall aalo aals aaoo aasa aasc aasd aass abaa abab abac abad abak abal abas abb- abba abbb abbo abbs abca abcb abcc abcd abcl abcs abda abdo abla ablo abls aboa abob abod abok abol aboo abos abs- absa absd absl abss acaa acab acac acad acas acba acbl acca accc accd acco accs acda acdb acdc acds ackd acks acla aclc acls acoa acod acol acos acsa acsc acsd acsl acss adaa adab adac adad adak adal adao adas adba adbc adcc adcs adda addc addd addl addo adds adls adob adoc adod adok adoo ados adsa adsl adso adss akaa akal akao akas akca akka akko aklo akok akos aksa alaa alac alad alak alal alao alas alb- alba albc albo albs alca alcc alco alcs ald- alda aldl aldo alds alk- alka alkb alkd alko all- alla alll allo alls aloa aloc alod alok alol aloo alos alsa alsc also aoba aoca aocs aoks aola aosd aoss asaa asab asac asad asak asal asao asas asba asbo asc- asca ascb ascc ascl asco asda asdl asdo asds aska asko asks asla aslo asob asoc asod asok asos assa assc assd assk assl asso asss baaa baad baak baal baas baba babb babo babs bac- baca bacc back baco bacs bada badb badd bado bads bak- baka bakl bako baks bala balc bald balk ball balo bals baol baos basa basc bask baso bass bbad bbas bbbb bbbs bbdd bbdo bblb bbls bcaa bcas bcbc bcbs bcca bccc bccl bccs bcda bcds bcos bcsa bcsc bcsl bcss bdbc bddc bdls bdos bdsd blaa blab blac blad blak blas bldc blkb blkd blls blob bloc blod blok bloo blss boab boac boad boak boal boas boba bobb bobo bobs boca bock boco bocs boda bodb bodo bods boka boko boks bola bold bolk boll bolo bols boob booc bood book bool boos bosa bosc bosk boso boss bsaa bsac bsas bsbd bscs bsdl bslc bsod bsos bssc bssd c-bo c-cd caaa caab caac caal caas caba cabo cabs cac- caca cacc cack caco cada cadc cadd cado cads caka cala calc cald calk call calo cals caod caol caos casa casb casc casd cask casl caso cass cbac cbal cbbc cbbs cbca cbcc cbcl cbcs cbdb cbdc cbdo cbds cbka cbkl cbko cblb cblc cbol cbsa cbsc ccaa ccab ccac ccad ccas ccba ccbc ccca cccb cccc cccl cccs ccdc ccds ccla cclc ccls ccob ccoc ccod ccsa ccsd ccsl ccss cdaa cdac cdad cdba cdcs cdda cddb cddl cdls cdos cdss ckac ckbc ckck ckcl ckco ckcs ckdo ckoa ckob ckoc ckoo ckos cksa cksb cksl ckso clab clad clas clcd cldc clob clod clok cloo clos clsa clsc