-al a-a a-b a-c aaa aab aac aae aaf aak aal aam ab- aba abb abc abe abf abk abl abm ac- aca acb acc ace acf ack acl acm aea aeb aec aee aef aek ael aem af- afa afb afc afe aff afk afl afm aka akb akc ake akk akl akm al- ala alb alc ale alf alk all alm ama amb amc ame amf amk aml amm baa bab bac bae baf bak bal bam bba bbb bbc bbe bbf bbk bbl bbm bca bcb bcc bce bcf bck bcl bcm be- bea beb bec bee bef bek bel bem bfa bfb bfc bfe bff bfl bfm bka bkb bkc bke bkf bkk bkl bkm bla blb blc ble blf blk bll blm bma bmb bmc bme bmf bmk bml bmm c-- caa cab cac cae caf cak cal cam cba cbb cbc cbe cbf cbk cbl cbm cca ccb ccc cce ccf cck ccl ccm ce- cea ceb cec cee cef cek cel cem cfa cfb cfc cfe cff cfk cfl cfm cka ckb ckc ckm cl- cla clb clc cle clf clk cll clm cma cmb cmc cme cmf cmk cml cmm eaa eab eac eae eaf eak eal eam eba ebb ebc ebe ebf ebk ebl ebm ec- eca ecb ecc ece ecf eck ecl ecm eea eeb eec eee eef eek eel eem ef- efa efb efc efe eff efl efm eka ekb ekc eke ekf ekl ela elb elc ele elf elk ell elm em- ema emb emc eme emf emk eml emm faa fab fac fae faf fak fal fam fba fbb fbc fbe fbf fbk fbl fbm fca fcb fcc fce fcf fck fcl fcm fea feb fec fee fef fek fel fem ffa ffc ffe fff ffk ffl ffm fka fkb fkc fkf fkk fkl fkm fla flb flc fle flf fll flm fma fmb fmc fme fmf fml fmm ka- kaa kab kac kae kaf kak kal kam kba kbb kbc kbe kbf kbk kbl kbm kca kcb kcc kce kck kcl kcm ke- kea keb kec kee kef kek kel kem kfa kfc kff kfm kkb kkc kke kkk kkl kkm kl- kla klb klc klf klm kma kmb kmc kme kmf kmk kml kmm la- laa lab lac lae laf lak lal lam lba lbb lbc lbe lbf lbk lbl lbm lca lcb lcc lce lcf lck lcl lcm lea leb lec lee lef lek lel lem lfa lfb lfc lfe lff lfk lfl lfm lka lkb lkl lla llb llc lle llf llk lll llm lma lmb lmc lme lmf lmk lml lmm m-f maa mab mac mae maf mak mal mam mba mbb mbc mbe mbf mbk mbl mbm mc- mca mcb mcc mce mcf mck mcl mcm mea meb mec mee mef mek mel mem mfa mfb mfc mfe mff mfl mfm mka mkb mkc mke mkk mkl mkm mla mlb mlc mle mlf mlk mll mlm mma mmb mmc mme mmf mmk mml mmm