-al -ol a-a a-b a-c aaa aab aac aad aal aao aas ab- aba abb abc abd abl abo abs ac- aca acb acc acd acl aco acs ad- ada adb adc add adl ado ads al- ala alb alc ald all alo als aoa aob aoc aod aol aoo aos as- asa asb asc asd asl aso ass baa bab bac bad bal bao bas bba bbb bbc bbd bbl bbo bbs bca bcb bcc bcd bcl bco bcs bda bdb bdc bdd bdl bdo bds bla blb blc bld bll blo bls boa bob boc bod bol boo bos bsa bsb bsc bsd bsl bso bss c-- caa cab cac cad cal cao cas cba cbb cbc cbd cbl cbo cbs cca ccb ccc ccd ccl cco ccs cda cdb cdc cdd cdl cdo cds cl- cla clb clc cld cll clo cls co- coa cob coc cod col coo cos csa csb csc csd csl cso css daa dab dac dad dal dao das dba dbb dbc dbd dbl dbo dbs dca dcb dcc dcd dcl dco dcs dda ddb ddc ddd ddl ddo dds dl- dla dlb dlc dld dll dlo dls doa dob doc dod dol doo dos dsa dsb dsc dsd dsl dso dss la- laa lab lac lad lal lao las lba lbb lbc lbd lbl lbo lbs lca lcb lcc lcd lcl lco lcs lda ldb ldc ldd ldl ldo lds lla llb llc lld lll llo lls loa lob loc lod lol loo los lsa lsb lsc lsd lsl lso lss oaa oab oac oad oal oao oas ob- oba obb obc obd obl obo obs oc- oca ocb occ ocd ocl oco ocs oda odb odc odd odl odo ods ola olb olc old oll olo ols oo- ooa oob ooc ood ool ooo oos os- osa osb osc osd osl oso oss saa sab sac sad sal sao sas sba sbb sbc sbd sbl sbo sbs sca scb scc scd scl sco scs sda sdb sdc sdd sdl sdo sds sla slb slc sld sll slo sls soa sob soc sod sol soo sos ss- ssa ssb ssc ssd ssl sso sss

a-do aaaa aaab aaac aaad aaal aaas aaba aabb aabc aabd aabl aaca aacb aacc aacd aacl aaco aacs aada aadc aads aala aalc aald aall aalo aals aaoo aasa aasc aasd aass abaa abab abac abad abal abas abb- abba abbb abbo abbs abca abcb abcc abcd abcl abcs abda abdo abla ablo abls aboa abob abod abol aboo abos abs- absa absd absl abss acaa acab acac acad acas acba acbl acca accc accd acco accs acda acdb acdc acds acla aclc acls acoa acod acol acos acsa acsc acsd acsl acss adaa adab adac adad adal adao adas adba adbc adcc adcs adda addc addd addl addo adds adls adob adoc adod adoo ados adsa adsl adso adss alaa alac alad alal alao alas alb- alba albc albo albs alca alcc alco alcs ald- alda aldl aldo alds all- alla alll allo alls aloa aloc alod alol aloo alos alsa alsc also aoba aoca aocs aola aosd aoss asaa asab asac asad asal asao asas asba asbo asc- asca ascb ascc ascl asco asda asdl asdo asds asla aslo asob asoc asod asos assa assc assd assl asso asss baaa baad baal baas baba babb babo babs bac- baca bacc baco bacs bada badb badd bado bads bala balc bald ball balo bals baol baos basa basc 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 blas bldc blls blob bloc blod bloo blss boab boac boad boal boas boba bobb bobo bobs boca boco bocs boda bodb bodo bods bola bold boll bolo bols boob booc bood bool boos bosa bosc 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 caco cada cadc cadd cado cads cala calc cald call calo cals caod caol caos casa casb casc casd casl caso cass cbac cbal cbbc cbbs cbca cbcc cbcl cbcs cbdb cbdc cbdo cbds 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 clab clad clas clcd cldc clob clod cloo clos clsa clsc coad coal coas coba cobb cobo cobs coca coco coda codd codl cods col- cola colb cold coll colo cols coob cood cool coos cosa cosc cosl coso coss csaa csab csac csao csas cscb cscc cscd cscl csco cscs csda csdb csla csld csob csos cssa cssd d-bo daab daad daal daas daba dabb dabo dabs daca dacs dada dado dads dala dall dalo dals daos dasa dasb dasc dasd dasl dass dbas dbcc dbcs dbls dbos dbsa dbss dcas dcbc dcca dccb dccc dccl dccs dcdb dcds dcls dcos dcsc dcss dddd ddlc ddoc ddss dlab dlbd dlco dlcs dlos doab doal doas doba dobb dobl dobs doca doco docs dod- doda dodd dodo dods dola dold doll dolo dols doob dood dool doos dosa doso doss dsac dsba dsbc dscc dscs dsda dsls dsoa dsos dssa dssc laaa laac laad laal laas laba labo labs laca lacc lacl laco lacs lada ladd lado lads lala lald lall lalo laos lasa lasd laso lass lbcc lbds lbos lbsc lcac lcad lcbc lcca lccc lccs lcdd lcds lcls lcsc lcsd ldls ldos llao llbs llcc llcs lldb lldc llds lllc llll lloa lloc llod lloo loac load loas lob- loba lobb lobo lobs loca locc loco locs loda lods lola lold loll lolo lols loob looc lood lool loos losa losc loso loss lscb lsco lscs lsds lsla lssa lsso oall oasc oasl oass obad