-al a-a a-b a-c a-t aaa aab aac aae aag aal aat ab- aba abb abc abe abg abl abt ac- aca acb acc ace acg acl act aea aeb aec aee aeg ael aet ag- aga agb agc age agg agl agt al- ala alb alc ale alg all alt at- ata atb atc ate atg atl att baa bab bac bae bag bal bat bba bbb bbc bbe bbg bbl bbt bca bcb bcc bce bcg bcl bct be- bea beb bec bee beg bel bet bga bgb bgc bge bgg bgl bgt bla blb blc ble blg bll blt bta btb btc bte btg btl btt c-- caa cab cac cae cag cal cat cba cbb cbc cbe cbg cbl cbt cca ccb ccc cce ccg ccl cct ce- cea ceb cec cee ceg cel cet cga cgb cgc cge cgg cgl cgt cl- cla clb clc cle clg cll clt cta ctb ctc cte ctg ctl ctt eaa eab eac eae eag eal eat eba ebb ebc ebe ebg ebl ebt ec- eca ecb ecc ece ecg ecl ect eea eeb eec eee eeg eel eet ega egb egc ege egg egl egt ela elb elc ele elg ell elt eta etb etc ete etg etl ett gaa gab gac gae gag gal gat gba gbc gbe gbg gbl gbt gca gcb gcc gce gcg gcl gct ge- gea geb gec gee geg gel get gga ggb ggc ggg ggt gla glb glc gle glg gll glt gta gtb gtc gte gtg gtl gtt la- laa lab lac lae lag lal lat lba lbb lbc lbe lbg lbl lbt lca lcb lcc lce lcg lcl lct lea leb lec lee leg lel let lga lgb lgc lge lgg lgl lgt lla llb llc lle llg lll llt lta ltb ltc lte ltg ltl ltt taa tab tac tae tag tal tat tba tbb tbc tbe tbg tbl tbt tca tcb tcc tce tcg tcl tct te- tea teb tec tee teg tel tet tga tgb tgc tge tgg tgl tgt tla tlc tle tlg tll tlt tta ttb ttc tte ttg ttl ttt