a-a a-b a-c aaa aab aac aad aaf aan aao aar aas aau aaw ab- aba abb abc abd abf abn abo abr abs abu abw ac- aca acb acc acd acf acn aco acr acs acu acw ad- ada adb adc add adf adn ado adr ads adu adw af- afa afb afc afd aff afn afo afr afs afu afw an- ana anb anc and anf ann ano anr ans anu aoa aob aoc aod aof aon aoo aor aos aou aow ar- ara arb arc ard arf arn aro arr ars aru arw as- asa asb asc asd asf asn aso asr ass asu asw au- aua aub auc aud auf aun auo aur aus auw aw- awa awb awc awd awf awn awo awr aws awu aww b-u baa bab bac bad baf ban bao bar bas bau baw bba bbb bbc bbd bbf bbn bbo bbr bbs bbu bbw bca bcb bcc bcd bcf bcn bco bcr bcs bcu bda bdb bdc bdd bdf bdo bdr bds bdu bdw bfa bfb bfc bfd bff bfn bfo bfr bfs bfu bna bnb bnc bnd bnf bnn bno bnr bns bnu bnw boa bob boc bod bof bon boo bor bos bou bow bra brb brd brf brn bro brr brs bru brw bsa bsb bsc bsd bsf bsn bso bsr bss bsu bsw bua bub buc bud buf bun buo bur bus buu buw bwa bwb bwc bwd bwf bwo bwr bws bwu c-- caa cab cac cad caf can cao car cas cau caw cba cbb cbc cbd cbf cbn cbo cbr cbs cbu cbw cca ccb ccc ccd ccf ccn cco ccr ccs ccu ccw cda cdb cdc cdd cdf cdn cdo cdr cds cdu cdw cfa cfb cfc cfd cff cfn cfo cfr cfs cfu cfw cn- cna cnb cnc cnd cnf cnn cno cnr cns cnu cnw co- coa cob coc cod cof con coo cor cos cou cow cra crb crc crd crf crn cro crr crs cru crw csa csb csc csd csf csn cso csr css csu csw cua cub cuc cud cuf cun cuo cur cus cuu cuw cw- cwa cwb cwc cwd cwn cwo cwr cws cwu daa dab dac dad daf dan dao dar das dau daw dba dbb dbc dbd dbf dbn dbo dbr dbs dbu dca dcb dcc dcd dcf dcn dco dcr dcs dcu dcw dda ddb ddc ddd ddf ddn ddo ddr dds ddu ddw dfa dfb dfc dfd dff dfn dfo dfr dfs dfu dfw dna dnb dnc dnd dnf dnn dno dnr dns dnw doa dob doc dod dof don doo dor dos dou dow dra drb drc drd drn dro drr drs dru drw dsa dsb dsc dsd dsf dsn dso dsr dss dsu dsw dua dub duc dud duf dun duo dur dus dwa dwb dwc dwf dwn dwo dwr dws dwu dww faa fab fac fad faf fan fao far fas fau faw fba fbb fbc fbd fbf fbn fbo fbr fbs fbu fbw fca fcb fcc fcd fcf fcn fco fcr fcs fcu fcw fda fdb fdc fdd fdf fdn fdo fdr fds fdu ffa ffc ffd fff ffn ffo ffr ffs ffu ffw fna fnb fnc fnd fnf fnn fnr fns fnu fnw foa fob foc fof fon foo for fos fou fow fra frb frc frd frf frn fro frr frs fru frw fsa fsb fsc fsd fsf fsn fso fsr fss fsu fsw fua fub fud fuf fun fuo fur fus fuu fwa fwb fwc fwd fwf fwn fwo fws naa nab nac nad naf nan nao nar nas nau naw nba nbb nbc nbd nbf nbn nbo nbr nbs nbu nbw nca ncb ncc ncd ncf ncn nco ncr ncs ncu ncw nda ndb ndc ndd ndf ndn ndo ndr nds ndu nfa nfb nfc nfd nff nfn nfo nfr nfs nfu nna nnb nnc nnf nnn nno nns nnu nnw no- noa nob noc nod nof non noo nor nos nou now nra nrb nrc nrd nrf nrn nro nrr nrs nru nrw nsa nsb nsc nsd nsf nsn nso nsr nss nsu nsw nua nub nuc nud nun nuo nur nus nuu nwa nwb nwc nwd nwf nwn nwo nwr nws nwu oaa oab oac oad oaf oan oao oar oas oau oaw ob- oba obb obc obd obf obn obo obr obs obu obw oc- oca ocb occ ocd ocf ocn oco ocr ocs ocu ocw oda odb odc odd odf odn odo odr ods odu of- ofa ofb ofc ofd off ofn ofo ofr ofs ofu ofw on- ona onb onc ond onf onn ono onr ons onu oo- ooa oob ooc ood oof oon ooo oor oos oow or- ora orb orc ord orf orn oro orr ors oru os- osa osb osc osd osf osn oso osr oss osu osw ou- oua ouc oud ouf oun ouo our ous owa owb owc owd owf own owo ows owu oww ra- raa rab rac rad raf ran rao rar ras rau raw rba rbb rbc rbd rbf rbn rbo rbr rbs rbu rbw rca rcb rcc rcd rcf rcn rco rcr rcs rcu rcw rda rdb rdc rdd rdf rdn rdo rdr rds rdu rfa rfb rfc rfd rff rfn rfo rfr rfs rfu rfw rna rnb rnc rnd rnn rno rnr rns rnu rnw roa rob roc rod rof ron roo ror ros rou row rra rrb rrc rrd rrf rrn rrr rrs rru rsa rsb rsc rsd rsf rsn rso rsr rss rsu rsw rua rub ruc rud ruf run ruo rur rus ruu rwa rwb rwc rwd rwf rwr rws rwu saa sab sac sad saf san sao sar sas sau saw sba sbb sbc sbd sbf sbn sbo sbr sbs sbu sbw sca scb scc scd scf scn sco scr scs scu scw sda sdb sdc sdd sdf sdn sdo sdr sds sdu sdw sfa sfb sfc sfd sff sfn sfo sfr sfs