-al -er a-a a-c aaa aac aae aaf aak aal aar ac- aca acc ace acf ack acl acr aea aec aee aef aek ael aer af- afa afc afe aff afk afl afr aka akc ake akk akl akr al- ala alc ale alf alk all alr ar- ara arc are arf ark arl arr c-- caa cac cae caf cak cal car cca ccc cce ccf cck ccl ccr ce- cea cec cee cef cek cel cer cfa cfc cfe cff cfk cfl cfr cka ckc cl- cla clc cle clf clk cll clr cra crc cre crf crk crl crr eaa eac eae eaf eak eal ear ec- eca ecc ece ecf eck ecl ecr eea eec eee eef eek eel eer ef- efa efc efe eff efl efr eka ekc eke ekf ekl ekr ela elc ele elf elk ell elr era erc ere erf erk erl err faa fac fae faf fak fal far fca fcc fce fcf fck fcl fcr fea fec fee fef fek fel fer ffa ffc ffe fff ffk ffl ffr fka fkc fkf fkk fkl fla flc fle flf fll flr fra frc fre frf frk frl frr ka- kaa kac kae kaf kak kal kar kca kcc kce kck kcl kcr ke- kea kec kee kef kek kel ker kfa kfc kff kkc kke kkk kkl kkr kl- kla klc klf klr kra krc krf krk krl krr la- laa lac lae laf lak lal lar lca lcc lce lcf lck lcl lcr lea lec lee lef lek lel ler lfa lfc lfe lff lfk lfl lfr lka lkl lkr lla llc lle llf llk lll llr lra lrc lrf lrk lrr ra- raa rac rae raf rak ral rar rca rcc rce rcf rcl rcr re- rea rec ree ref rek rel rer rfa rfc rfe rff rfk rfl rfr rkc rke rkf rkk rla rlc rle rlf rll rlr rra rrc rrf rrk rrl rrr