-al -er a-a a-c a-t aaa aac aae aaf aag aal aar aat ac- aca acc ace acf acg acl acr act aea aec aee aef aeg ael aer aet af- afa afc afe aff afg afl afr aft ag- aga agc age agf agg agl agr agt al- ala alc ale alf alg all alr alt ar- ara arc are arf arg arl arr art at- ata atc ate atf atg atl atr att c-- caa cac cae caf cag cal car cat cca ccc cce ccf ccg ccl ccr cct ce- cea cec cee cef ceg cel cer cet cfa cfc cfe cff cfg cfl cfr cft cga cgc cge cgg cgl cgr cgt cl- cla clc cle clf clg cll clr clt cra crc cre crf crg crl crr crt cta ctc cte ctf ctg ctl ctr ctt eaa eac eae eaf eag eal ear eat ec- eca ecc ece ecf ecg ecl ecr ect eea eec eee eef eeg eel eer eet ef- efa efc efe eff efg efl efr eft ega egc ege egf egg egl egr egt ela elc ele elf elg ell elr elt era erc ere erf erg erl err ert eta etc ete etf etg etl etr ett faa fac fae faf fag fal far fat fca fcc fce fcf fcg fcl fcr fct fea fec fee fef feg fel fer fet ffa ffc ffe fff ffg ffl ffr fft fga fgc fge fgf fgg fgl fgr fgt fla flc fle flf flg fll flr flt fra frc fre frf frg frl frr frt fta ftc fte ftf ftg ftl ftr ftt gaa gac gae gaf gag gal gar gat gca gcc gce gcf gcg gcl gcr gct ge- gea gec gee gef geg gel ger get gfa gfc gfe gff gfl gfr gft gga ggc ggg ggr ggt gla glc gle glf glg gll glr glt gra grc gre grf grg grl grr grt gta gtc gte gtf gtg gtl gtr gtt la- laa lac lae laf lag lal lar lat lca lcc lce lcf lcg lcl lcr lct lea lec lee lef leg lel ler let lfa lfc lfe lff lfg lfl lfr lft lga lgc lge lgf lgg lgl lgr lgt lla llc lle llf llg lll llr llt lra lrc lrf lrg lrr lrt lta ltc lte ltf ltg ltl ltr ltt ra- raa rac rae raf rag ral rar rat rca rcc rce rcf rcg rcl rcr rct re- rea rec ree ref reg rel rer ret rfa rfc rfe rff rfg rfl rfr rft rga rgc rge rgf rgg rgr rgt rla rlc rle rlf rlg rll rlr rlt rra rrc rrf rrg rrl rrr rrt rta rtc rte rtf rtg rtl rtr rtt taa tac tae taf tag tal tar tat tca tcc tce tcf tcg tcl tcr tct te- tea tec tee tef teg tel ter tet tfa tfc tfe tff tfg tfl tfr tft tga tgc tge tgf tgg tgl tgr tgt tla tlc tle tlf tlg tll tlr tlt tra trc tre trf trg trl trr trt tta ttc tte ttf ttg ttl ttr ttt