-er a-a a-c aaa aac aae aag aaj aak aan aar ac- aca acc ace acg acj ack acn acr aea aec aee aeg aej aek aen aer ag- aga agc age agg agj agk agn agr aja ajc aje ajj ajk ajn ajr aka akc ake akg akj akk akn akr an- ana anc ane ang anj ank ann anr ar- ara arc are arg arj ark arn arr c-- c-j caa cac cae cag caj cak can car cca ccc cce ccg ccj cck ccn ccr ce- cea cec cee ceg cej cek cen cer cga cgc cge cgg cgn cgr cja cjc cjg cjk cjr cka ckc cn- cna cnc cne cng cnj cnn cnr cra crc cre crg crj crk crn crr eaa eac eae eag eaj eak ean ear ec- eca ecc ece ecg ecj eck ecn ecr eea eec eee eeg eek een eer ega egc ege egg egn egr eja ejc eka ekc eke ekg ekr en- ena enc ene eng enk enn enr era erc ere erg erk ern err gaa gac gae gag gaj gak gan gar gca gcc gce gcg gck gcn gcr ge- gea gec gee geg gek gen ger gga ggc ggg ggj ggn ggr gja gjc gje gjg gjr gka gkn gna gnc gne gnn gnr gra grc gre grg grj grk grn grr jaa jac jae jag jaj jak jan jar jca jcc jce jck jcr jea jec jee jeg jej jek jen jer jga jge jgn jgr jja jjc jjg jjj jjk jjr jka jkk jkn jkr jna jnc jne jng jnj jnn jnr jra jrc jrg jrk jrn jrr ka- kaa kac kae kag kaj kak kan kar kca kcc kce kcg kck kcn kcr ke- kea kec kee keg kek ken ker kga kgc kjc kje kjr kkc kke kkk kkn kkr kn- kna knc kne kng knk knn knr kra krc krg krk krn krr naa nac nae nag naj nak nan nar nca ncc nce ncg nck ncn ncr ne- nea nec nee neg nej nek nen ner nga ngc nge ngg ngj ngk ngn nja njc nje njk njn nka nkc nke nkj nkk nkn nkr nna nnc nne nng nnk nnn nra nrc nre nrg nrj nrk nrn nrr ra- raa rac rae rag raj rak ran rar rca rcc rce rcg rcj rcn rcr re- rea rec ree reg rek ren rer rga rgc rge rgg rgk rgn rgr rja rjc rjg rjk rjr rkc rke rkg rkk rna rnc rng rnn rnr rra rrc rrg rrk rrn rrr