-al -ol a-a a-c aaa aac aad aaf aak aal aao aar ac- aca acc acd acf ack acl aco acr ad- ada adc add adf adk adl ado adr af- afa afc afd aff afk afl afo afr aka akc akd akk akl ako akr al- ala alc ald alf alk all alo alr aoa aoc aod aof aok aol aoo aor ar- ara arc ard arf ark arl aro arr c-- caa cac cad caf cak cal cao car cca ccc ccd ccf cck ccl cco ccr cda cdc cdd cdf cdk cdl cdo cdr cfa cfc cfd cff cfk cfl cfo cfr cka ckc ckd cko cl- cla clc cld clf clk cll clo clr co- coa coc cod cof cok col coo cor cra crc crd crf crk crl cro crr daa dac dad daf dak dal dao dar dca dcc dcd dcf dck dcl dco dcr dda ddc ddd ddf ddk ddl ddo ddr dfa dfc dfd dff dfk dfl dfo dfr dka dkc dkk dkl dko dkr dl- dla dlc dld dlf dlk dll dlo dlr doa doc dod dof dok dol doo dor dra drc drd drk drl dro drr faa fac fad faf fak fal fao far fca fcc fcd fcf fck fcl fco fcr fda fdc fdd fdf fdk fdl fdo fdr ffa ffc ffd fff ffk ffl ffo ffr fka fkc fkf fkk fkl fla flc fld flf fll flo flr foa foc fof fok fol foo for fra frc frd frf frk frl fro frr ka- kaa kac kad kaf kak kal kao kar kca kcc kcd kck kcl kcr kda kdc kdf kdk kdl kdo kdr kfa kfc kfd kff kfo kkc kkk kkl kkr kl- kla klc kld klf klo klr koa koc kod kof kok kol koo kor kra krc krd krf krk krl kro krr la- laa lac lad laf lak lal lao lar lca lcc lcd lcf lck lcl lco lcr lda ldc ldd ldf ldk ldl ldo ldr lfa lfc lfd lff lfk lfl lfo lfr lka lkl lkr lla llc lld llf llk lll llo llr loa loc lod lof lok lol loo lor lra lrc lrd lrf lrk lro lrr oaa oac oad oaf oak oal oao oar oc- oca occ ocd ocf ock ocl oco ocr oda odc odd odf odl odo odr of- ofa ofc ofd off ofl ofo ofr oka okc okd okk okl oko okr ola olc old olf olk oll olo oo- ooa ooc ood oof ook ool ooo oor or- ora orc ord orf ork orl oro orr ra- raa rac rad raf rak ral rao rar rca rcc rcd rcf rcl rco rcr rda rdc rdd rdf rdl rdo rdr rfa rfc rfd rff rfk rfl rfo rfr rkc rkf rkk rko rla rlc rld rlf rll rlo rlr roa roc rod rof rok rol roo ror rra rrc rrd rrf rrk rrl rrr