-al a-a a-c aaa aac aae aaf aag aal ac- aca acc ace acf acg acl aea aec aee aef aeg ael af- afa afc afe aff afg afl ag- aga agc age agf agg agl al- ala alc ale alf alg all c-- caa cac cae caf cag cal cca ccc cce ccf ccg ccl ce- cea cec cee cef ceg cel cfa cfc cfe cff cfg cfl cga cgc cge cgg cgl cl- cla clc cle clf clg cll eaa eac eae eaf eag eal ec- eca ecc ece ecf ecg ecl eea eec eee eef eeg eel ef- efa efc efe eff efg efl ega egc ege egf egg egl ela elc ele elf elg ell faa fac fae faf fag fal fca fcc fce fcf fcg fcl fea fec fee fef feg fel ffa ffc ffe fff ffg ffl fga fgc fge fgf fgg fgl fla flc fle flf flg fll gaa gac gae gaf gag gal gca gcc gce gcf gcg gcl ge- gea gec gee gef geg gel gfa gfc gfe gff gfl gga ggc ggg gla glc gle glf glg gll la- laa lac lae laf lag lal lca lcc lce lcf lcg lcl lea lec lee lef leg lel lfa lfc lfe lff lfg lfl lga lgc lge lgf lgg lgl lla llc lle llf llg lll