a-a a-b a-c aaa aab aac aad aaf aaj aao aar aas ab- aba abb abc abd abf abj abo abr abs ac- aca acb acc acd acf acj aco acr acs ad- ada adb adc add adf adj ado adr ads af- afa afb afc afd aff afj afo afr afs aja ajb ajc ajd ajf ajj ajo ajr ajs aoa aob aoc aod aof aoj aoo aor aos ar- ara arb arc ard arf arj aro arr ars as- asa asb asc asd asf asj aso asr ass baa bab bac bad baf baj bao bar bas bba bbb bbc bbd bbf bbo bbr bbs bca bcb bcc bcd bcf bcj bco bcr bcs bda bdb bdc bdd bdf bdj bdo bdr bds bfa bfb bfc bfd bff bfj bfo bfr bfs bja bjc bjd bjf bjj bjr bjs boa bob boc bod bof boj boo bor bos bra brb brd brf brj bro brr brs bsa bsb bsc bsd bsf bsj bso bsr bss c-- c-j caa cab cac cad caf caj cao car cas cba cbb cbc cbd cbf cbj cbo cbr cbs cca ccb ccc ccd ccf ccj cco ccr ccs cda cdb cdc cdd cdf cdj cdo cdr cds cfa cfb cfc cfd cff cfo cfr cfs cja cjb cjc cjd cjf cjr cjs co- coa cob coc cod cof coj coo cor cos cra crb crc crd crf crj cro crr crs csa csb csc csd csf csj cso csr css daa dab dac dad daf daj dao dar das dba dbb dbc dbd dbf dbo dbr dbs dca dcb dcc dcd dcf dco dcr dcs dda ddb ddc ddd ddf ddo ddr dds dfa dfb dfc dfd dff dfj dfo dfr dfs dj- dja djb djc djd djf djo djs doa dob doc dod dof doj doo dor dos dra drb drc drd drj dro drr drs dsa dsb dsc dsd dsf dsj dso dsr dss faa fab fac fad faf faj fao far fas fba fbb fbc fbd fbf fbo fbr fbs fca fcb fcc fcd fcf fcj fco fcr fcs fda fdb fdc fdd fdf fdj fdo fdr fds ffa ffc ffd fff ffo ffr ffs fja fjb fjc fjd fjs foa fob foc fof foo for fos fra frb frc frd frf frj fro frr frs fsa fsb fsc fsd fsf fsj fso fsr fss j-d jaa jab jac jad jaf jaj jao jar jas jba jbc jbf jbj jbo jbr jbs jca jcb jcc jcd jcf jco jcr jcs jda jdb jdc jdf jdo jdr jds jfa jfb jfc jfd jff jfj jfo jfr jfs jja jjb jjc jjf jjj jjr jjs joa job joc jod jof joj joo jor jos jra jrb jrc jrf jro jrr jrs jsa jsb jsc jsd jsf jsj jso jsr jss oaa oab oac oad oaf oaj oao oar oas ob- oba obb obc obd obf obj obo obr obs oc- oca ocb occ ocd ocf ocj oco ocr ocs oda odb odc odd odf odo odr ods of- ofa ofb ofc ofd off ofo ofr ofs oja ojb ojc ojd ojo ojs oo- ooa oob ooc ood oof ooo oor oos or- ora orb orc ord orf oro orr ors os- osa osb osc osd osf osj oso osr oss ra- raa rab rac rad raf raj rao rar ras rba rbb rbc rbd rbf rbo rbr rbs rca rcb rcc rcd rcf rcj rco rcr rcs rda rdb rdc rdd rdf rdj rdo rdr rds rfa rfb rfc rfd rff rfj rfo rfr rfs rja rjc rjf rjr roa rob roc rod rof roj roo ror ros rra rrb rrc rrd rrf rrr rrs rsa rsb rsc rsd rsf rsj rso rsr rss saa sab sac sad saf saj sao sar sas sba sbb sbc sbd sbf sbj sbo sbr sbs sca scb scc scd scf scj sco scr scs sda sdb sdc sdd sdf sdj sdo sdr sds sfa sfb sfc sfd sff sfj sfo sfr sfs sja sjb sjc sjd sjf sjj sjr sjs soa sob soc sod sof soj soo sor sos sr- sra srb src srd srf srj sro srr srs ss- ssa ssb ssc ssd ssf ssj sso ssr sss