-al -ol a-a a-b a-c aaa aab aac aad aaf aak aal aam aao aar ab- aba abb abc abd abf abk abl abm abo abr ac- aca acb acc acd acf ack acl acm aco acr ad- ada adb adc add adf adk adl adm ado adr af- afa afb afc afd aff afk afl afm afo afr aka akb akc akd akk akl akm ako akr al- ala alb alc ald alf alk all alm alo alr ama amb amc amd amf amk aml amm amo amr aoa aob aoc aod aof aok aol aom aoo aor ar- ara arb arc ard arf ark arl arm aro arr baa bab bac bad baf bak bal bam bao bar bba bbb bbc bbd bbf bbk bbl bbm bbo bbr bca bcb bcc bcd bcf bck bcl bcm bco bcr bda bdb bdc bdd bdf bdk bdl bdm bdo bdr bfa bfb bfc bfd bff bfl bfm bfo bfr bka bkb bkc bkf bkk bkl bkm bko bkr bla blb blc bld blf blk bll blm blo blr bma bmb bmc bmd bmf bmk bml bmm bmo bmr boa bob boc bod bof bok bol bom boo bor bra brb brd brf brk brl brm bro brr c-- caa cab cac cad caf cak cal cam cao car cba cbb cbc cbd cbf cbk cbl cbm cbo cbr cca ccb ccc ccd ccf cck ccl ccm cco ccr cda cdb cdc cdd cdf cdk cdl cdm cdo cdr cfa cfb cfc cfd cff cfk cfl cfm cfo cfr cka ckb ckc ckd ckm cko cl- cla clb clc cld clf clk cll clm clo clr cma cmb cmc cmd cmf cmk cml cmm cmo cmr co- coa cob coc cod cof cok col com coo cor cra crb crc crd crf crk crl crm cro crr daa dab dac dad daf dak dal dam dao dar dba dbb dbc dbd dbf dbk dbl dbm dbo dbr dca dcb dcc dcd dcf dck dcl dcm dco dcr dda ddb ddc ddd ddf ddk ddl ddm ddo ddr dfa dfb dfc dfd dff dfk dfl dfm dfo dfr dka dkb dkc dkk dkl dkm dko dkr dl- dla dlb dlc dld dlf dlk dll dlm dlo dlr dma dmb dmc dmd dmf dmk dml dmm dmo dmr doa dob doc dod dof dok dol dom doo dor dra drb drc drd drk drl drm dro drr faa fab fac fad faf fak fal fam fao far fba fbb fbc fbd fbf fbk fbl fbm fbo fbr fca fcb fcc fcd fcf fck fcl fcm fco fcr fda fdb fdc fdd fdf fdk fdl fdm fdo fdr ffa ffc ffd fff ffk ffl ffm ffo ffr fka fkb fkc fkf fkk fkl fkm fla flb flc fld flf fll flm flo flr fma fmb fmc fmd fmf fml fmm fmo fmr foa fob foc fof fok fol fom foo for fra frb frc frd frf frk frl frm fro frr ka- kaa kab kac kad kaf kak kal kam kao kar kba kbb kbc kbd kbf kbk kbl kbm kbo kbr kca kcb kcc kcd kck kcl kcm kcr kda kdb kdc kdf kdk kdl kdm kdo kdr kfa kfc kfd kff kfm kfo kkb kkc kkk kkl kkm kkr kl- kla klb klc kld klf klm klo klr kma kmb kmc kmd kmf kmk kml kmm kmo koa kob koc kod kof kok kol kom koo kor kra krc krd krf krk krl kro krr la- laa lab lac lad laf lak lal lam lao lar lba lbb lbc lbd lbf lbk lbl lbm lbo lbr lca lcb lcc lcd lcf lck lcl lcm lco lcr lda ldb ldc ldd ldf ldk ldl ldm ldo ldr lfa lfb lfc lfd lff lfk lfl lfm lfo lfr lka lkb lkl lkr lla llb llc lld llf llk lll llm llo llr lma lmb lmc lmd lmf lmk lml lmm lmo lmr loa lob loc lod lof lok lol lom loo lor lra lrb lrc lrd lrf lrk lrm lro lrr m-f m-o m-r maa mab mac mad maf mak mal mam mao mar mba mbb mbc mbd mbf mbk mbl mbm mbo mbr mc- mca mcb mcc mcd mcf mck mcl mcm mco mcr mda mdb mdc mdd mdf mdk mdl mdm mdo mdr mfa mfb mfc mfd mff mfl mfm mfo mfr mka mkb mkc mkd mkk mkl mkm mko mkr mla mlb mlc mld mlf mlk mll mlm mlo mlr mma mmb mmc mmd mmf mmk mml mmm mmo mmr moa mob moc mod mof mok mol mom moo mor mra mrb mrc mrd mrf mrk mrl mrm mro mrr oaa oab oac oad oaf oak oal oam oao oar ob- oba obb obc obd obf obk obl obm obo obr oc- oca ocb occ ocd ocf ock ocl ocm oco ocr oda odb odc odd odf odl odm odo odr of- ofa ofb ofc ofd off ofl ofm ofo ofr oka okb okc okd okk okl oko okr ola olb olc old olf olk oll olm olo om- oma omb omc omd omf oml omm omo omr oo- ooa oob ooc ood oof ook ool oom ooo oor or- ora orb orc ord orf ork orl orm oro orr ra- raa rab rac rad raf rak ral ram rao rar rba rbb rbc rbd rbf rbk rbl rbm rbo rbr rca rcb rcc rcd rcf rcl rcm rco rcr rda rdb rdc rdd rdf rdl rdm rdo rdr rfa rfb rfc rfd rff rfk rfl rfm rfo rfr rkb rkc rkf rkk rkm rko rla rlc rld rlf rll rlm rlo rlr rma rmb rmc rmd rmf rml rmm rmo rmr roa rob roc rod rof rok rol rom roo ror rra rrb rrc rrd rrf rrk rrl rrm rrr

a-ak a-do a-ok aaaa aaab aaac aaad aaaf aaal aaam aaar aaba aabb aabc aabd aabl aabm aaca aacb aacc aacd aacf aack aacl aacm aaco aacr aada aadc aafa