-al -er -ic a-a a-c a-i a-t aaa aac aae aaf aag aai aak aal aar aat ac- aca acc ace acf acg aci ack acl acr act aea aec aee aef aeg aei aek ael aer aet af- afa afc afe aff afg afi afk afl afr aft ag- aga agc age agf agg agi agk agl agr agt ai- aia aic aie aif aig aii aik ail air ait aka akc ake akg aki akk akl akr al- ala alc ale alf alg ali alk all alr alt ar- ara arc are arf arg ari ark arl arr art at- ata atc ate atf atg ati atl atr att c-- caa cac cae caf cag cai cak cal car cat cca ccc cce ccf ccg cci cck ccl ccr cct ce- cea cec cee cef ceg cei cek cel cer cet cfa cfc cfe cff cfg cfi cfk cfl cfr cft cga cgc cge cgg cgi cgl cgr cgt ci- cia cic cie cif cig cii cik cil cir cit cka ckc cki ckt cl- cla clc cle clf clg cli clk cll clr clt cra crc cre crf crg cri crk crl crr crt cta ctc cte ctf ctg cti ctk ctl ctr ctt eaa eac eae eaf eag eai eak eal ear eat ec- eca ecc ece ecf ecg eci eck ecl ecr ect eea eec eee eef eeg eek eel eer eet ef- efa efc efe eff efg efi efl efr eft ega egc ege egf egg egi egl egr egt eia eic eie eif eig eii eik eil eir eit eka ekc eke ekf ekg eki ekl ekr ekt ela elc ele elf elg eli elk ell elr elt era erc ere erf erg eri erk erl err ert eta etc ete etf etg eti etk etl etr ett faa fac fae faf fag fai fak fal far fat fca fcc fce fcf fcg fci fck fcl fcr fct fea fec fee fef feg fei fek fel fer fet ffa ffc ffe fff ffg ffi ffk ffl ffr fft fga fgc fge fgf fgg fgi fgl fgr fgt fia fic fie fif fig fii fik fil fir fit fka fkc fkf fkg fki fkk fkl fkt fla flc fle flf flg fli fll flr flt fra frc fre frf frg fri frk frl frr frt fta ftc fte ftf ftg fti ftk ftl ftr ftt gaa gac gae gaf gag gai gak gal gar gat gca gcc gce gcf gcg gci gck gcl gcr gct ge- gea gec gee gef geg gei gek gel ger get gfa gfc gfe gff gfi gfk gfl gfr gft gga ggc ggg ggi ggr ggt gia gic gie gif gig gii gik gil gir git gka gkt gla glc gle glf glg gli glk gll glr glt gra grc gre grf grg gri grk grl grr grt gta gtc gte gtf gtg gti gtk gtl gtr gtt i-f ia- iaa iac iae iaf iag iai ial iar iat ica icc ice icf icg ici ick icl icr ict ie- iea iec iee ief ieg iei iek iel ier iet ifa ifc ife iff ifg ifi ifl ifr ift iga igc ige igf igg igi igk igl igr igt iia iic iie iif iii iil iir iit ika ikc ike ikf iki ikk ikl ikr ikt il- ila ilc ile ilf ilg ili ilk ill ilr ilt ir- ira irc ire irf irg iri irk irl irr irt ita itc ite itf itg iti itk itl itt k-t ka- kaa kac kae kaf kag kai kak kal kar kat kca kcc kce kcg kci kck kcl kcr kct ke- kea kec kee kef keg kei kek kel ker ket kfa kfc kff kfg kfi kga kgc kgf kgi kgl kia kic kie kif kig kii kik kil kir kit kkc kke kki kkk kkl kkr kkt kl- kla klc klf klg kli klr klt kra krc krf krg kri krk krl krr krt kta ktc kte ktf ktg ktk ktl ktr ktt la- laa lac lae laf lag lai lak lal lar lat lca lcc lce lcf lcg lci lck lcl lcr lct lea lec lee lef leg lei lek lel ler let lfa lfc lfe lff lfg lfi lfk lfl lfr lft lga lgc lge lgf lgg lgi lgk lgl lgr lgt lia lic lie lif lig lii lik lil lir lit lka lkg lkl lkr lkt lla llc lle llf llg lli llk lll llr llt lra lrc lrf lrg lri lrk lrr lrt lta ltc lte ltf ltg lti ltk ltl ltr ltt ra- raa rac rae raf rag rai rak ral rar rat rca rcc rce rcf rcg rci rcl rcr rct re- rea rec ree ref reg rei rek rel rer ret rfa rfc rfe rff rfg rfi rfk rfl rfr rft rga rgc rge rgf rgg rgi rgk rgr rgt ria ric rie rif rig rii rik ril rir rit rkc rke rkf rkg rkk rkt rla rlc rle rlf rlg rli rll rlr rlt rra rrc rrf rrg rri rrk rrl rrr rrt rta rtc rte rtf rtg rti rtk rtl rtr rtt taa tac tae taf tag tai tak tal tar tat tca tcc tce tcf tcg tci tck tcl tcr tct te- tea tec tee tef teg tei tek tel ter tet tfa tfc tfe tff tfg tfi tfk tfl tfr tft tga tgc tge tgf tgg tgi tgk tgl tgr tgt tia tic tie tif tig tii tik til tir tit tka tkc tke tkg tkk tkl tkr tkt tla tlc tle tlf tlg tli tlk tll tlr tlt tra trc tre trf trg tri trk trl trr trt tta ttc tte ttf ttg tti ttk ttl ttr ttt