-er a-a aaa aad aae aag aak aan aar ad- ada add ade adg adk adn adr aea aed aee aeg aek aen aer ag- aga agd age agg agk agn agr aka akd ake akg akk akn akr an- ana and ane ang ank ann anr ar- ara ard are arg ark arn arr daa dad dae dag dak dan dar dda ddd dde ddg ddk ddn ddr de- dea ded dee deg dek den der dga dgd dge dgg dgk dgn dgr dka dke dkg dkk dkr dna dnd dne dng dnk dnn dnr dra drd dre drg drk drn drr eaa ead eae eag eak ean ear ed- eda edd ede edg edk edn edr eea eed eee eeg eek een eer ega egd ege egg egn egr eka ekd eke ekg ekr en- ena end ene eng enk enn enr era erd ere erg erk ern err g-d gaa gad gae gag gak gan gar gda gdd gde gdk gdn gdr ge- gea ged gee geg gek gen ger gga ggd ggg ggn ggr gka gkd gkn gna gnd gne gnn gnr gra grd gre grg grk grn grr ka- kaa kad kae kag kak kan kar kda kde kdg kdk kdr ke- kea ked kee keg kek ken ker kga kgd kke kkk kkn kkr kn- kna knd kne kng knk knn knr kra krd krg krk krn krr naa nad nae nag nak nan nar nda ndd nde ndg ndk ndn ndr ne- nea ned nee neg nek nen ner nga ngd nge ngg ngk ngn nka nke nkk nkn nkr nna nne nng nnk nnn nra nrd nre nrg nrk nrn nrr ra- raa rad rae rag rak ran rar rda rdd rde rdg rdn rdr re- rea red ree reg rek ren rer rga rgd rge rgg rgk rgn rgr rke rkg rkk rna rnd rng rnn rnr rra rrd rrg rrk rrn rrr