-er a-a aaa aae aag aak aan aar aea aee aeg aek aen aer ag- aga age agg agk agn agr aka ake akg akk akn akr an- ana ane ang ank ann anr ar- ara are arg ark arn arr eaa eae eag eak ean ear eea eee eeg eek een eer ega ege egg egn egr eka eke ekg ekr en- ena ene eng enk enn enr era ere erg erk ern err gaa gae gag gak gan gar ge- gea gee geg gek gen ger gga ggg ggn ggr gka gkn gna gne gnn gnr gra gre grg grk grn grr ka- kaa kae kag kak kan kar ke- kea kee keg kek ken ker kga kke kkk kkn kkr kn- kna kne kng knk knn knr kra krg krk krn krr naa nae nag nak nan nar ne- nea nee neg nek nen ner nga nge ngg ngk ngn nka nke nkk nkn nkr nna nne nng nnk nnn nra nre nrg nrk nrn nrr ra- raa rae rag rak ran rar re- rea ree reg rek ren rer rga rge rgg rgk rgn rgr rke rkg rkk rna rng rnn rnr rra rrg rrk rrn rrr