-al a-a a-c aaa aac aae aag aak aal ac- aca acc ace acg ack acl aea aec aee aeg aek ael ag- aga agc age agg agk agl aka akc ake akg akk akl al- ala alc ale alg alk all c-- caa cac cae cag cak cal cca ccc cce ccg cck ccl ce- cea cec cee ceg cek cel cga cgc cge cgg cgl cka ckc cl- cla clc cle clg clk cll eaa eac eae eag eak eal ec- eca ecc ece ecg eck ecl eea eec eee eeg eek eel ega egc ege egg egl eka ekc eke ekg ekl ela elc ele elg elk ell gaa gac gae gag gak gal gca gcc gce gcg gck gcl ge- gea gec gee geg gek gel gga ggc ggg gka gla glc gle glg glk gll ka- kaa kac kae kag kak kal kca kcc kce kcg kck kcl ke- kea kec kee keg kek kel kga kgc kgl kkc kke kkk kkl kl- kla klc klg la- laa lac lae lag lak lal lca lcc lce lcg lck lcl lea lec lee leg lek lel lga lgc lge lgg lgk lgl lka lkg lkl lla llc lle llg llk lll