-er a-a a-c a-t aaa aac aae aag aaj aak aan aar aat ac- aca acc ace acg acj ack acn acr act aea aec aee aeg aej aek aen aer aet ag- aga agc age agg agj agk agn agr agt aja ajc aje ajj ajk ajn ajr ajt aka akc ake akg akj akk akn akr an- ana anc ane ang anj ank ann anr ant ar- ara arc are arg arj ark arn arr art at- ata atc ate atg atn atr att c-- c-j caa cac cae cag caj cak can car cat cca ccc cce ccg ccj cck ccn ccr cct ce- cea cec cee ceg cej cek cen cer cet cga cgc cge cgg cgn cgr cgt cja cjc cjg cjk cjr cka ckc ckt cn- cna cnc cne cng cnj cnn cnr cnt cra crc cre crg crj crk crn crr crt cta ctc cte ctg ctk ctn ctr ctt eaa eac eae eag eaj eak ean ear eat ec- eca ecc ece ecg ecj eck ecn ecr ect eea eec eee eeg eek een eer eet ega egc ege egg egn egr egt eja ejc ejt eka ekc eke ekg ekr ekt en- ena enc ene eng enk enn enr ent era erc ere erg erk ern err ert eta etc ete etg etj etk etn etr ett gaa gac gae gag gaj gak gan gar gat gca gcc gce gcg gck gcn gcr gct ge- gea gec gee geg gek gen ger get gga ggc ggg ggj ggn ggr ggt gja gjc gje gjg gjr gjt gka gkn gkt gna gnc gne gnn gnr gnt gra grc gre grg grj grk grn grr grt gta gtc gte gtg gtk gtn gtr gtt jaa jac jae jag jaj jak jan jar jat jca jcc jce jck jcr jct jea jec jee jeg jej jek jen jer jet jga jge jgn jgr jgt jja jjc jjg jjj jjk jjr jka jkk jkn jkr jkt jna jnc jne jng jnj jnn jnr jnt jra jrc jrg jrk jrn jrr jrt jta jtc jte jtg jtk jtn jtr jtt k-t ka- kaa kac kae kag kaj kak kan kar kat kca kcc kce kcg kck kcn kcr kct ke- kea kec kee keg kek ken ker ket kga kgc kjc kje kjr kkc kke kkk kkn kkr kkt kn- kna knc kne kng knk knn knr knt kra krc krg krk krn krr krt kta ktc kte ktg ktj ktk ktn ktr ktt naa nac nae nag naj nak nan nar nat nca ncc nce ncg nck ncn ncr nct ne- nea nec nee neg nej nek nen ner net nga ngc nge ngg ngj ngk ngn ngt nja njc nje njk njn nka nkc nke nkj nkk nkn nkr nkt nna nnc nne nng nnk nnn nnt nra nrc nre nrg nrj nrk nrn nrr nrt nta ntc nte ntg ntk ntn ntr ntt ra- raa rac rae rag raj rak ran rar rat rca rcc rce rcg rcj rcn rcr rct re- rea rec ree reg rek ren rer ret rga rgc rge rgg rgk rgn rgr rgt rja rjc rjg rjk rjr rkc rke rkg rkk rkt rna rnc rng rnn rnr rnt rra rrc rrg rrk rrn rrr rrt rta rtc rte rtg rtj rtk rtn rtr rtt taa tac tae tag taj tak tan tar tat tca tcc tce tcg tcj tck tcn tcr tct te- tea tec tee teg tej tek ten ter tet tga tgc tge tgg tgk tgn tgr tgt tjc tje tjr tka tkc tke tkg tkk tkr tkt tna tnc tne tng tnk tnn tnr tnt tra trc tre trg trk trn trr trt tta ttc tte ttg ttk ttn ttr ttt