-er a-a aaa aad aae aak aan aao aar ad- ada add ade adk adn ado adr aea aed aee aek aen aeo aer aka akd ake akk akn ako akr an- ana and ane ank ann ano anr aoa aod aoe aok aon aoo aor ar- ara ard are ark arn aro arr daa dad dae dak dan dao dar dda ddd dde ddk ddn ddo ddr de- dea ded dee dek den deo der dka dke dkk dko dkr dna dnd dne dnk dnn dno dnr doa dod doe dok don doo dor dra drd dre drk drn dro drr eaa ead eae eak ean eao ear ed- eda edd ede edk edn edo edr eea eed eee eek een eeo eer eka ekd eke eko ekr en- ena end ene enk enn eno enr eo- eoa eod eoe eok eon eoo eor era erd ere erk ern ero err ka- kaa kad kae kak kan kao kar kda kde kdk kdo kdr ke- kea ked kee kek ken keo ker kke kkk kkn kkr kn- kna knd kne knk knn kno knr koa kod koe kok kon koo kor kra krd krk krn kro krr naa nad nae nak nan nao nar nda ndd nde ndk ndn ndo ndr ne- nea ned nee nek nen neo ner nka nke nkk nkn nko nkr nna nne nnk nnn nno no- noa nod noe nok non noo nor nra nrd nre nrk nrn nro nrr oaa oad oae oak oan oao oar oda odd ode odn odo odr oea oed oee oen oeo oer oka okd oke okk oko okr on- ona ond one onk onn ono onr oo- ooa ood ook oon ooo oor or- ora ord ore ork orn oro orr ra- raa rad rae rak ran rao rar rda rdd rde rdn rdo rdr re- rea red ree rek ren reo rer rke rkk rko rna rnd rnn rno rnr roa rod roe rok ron roo ror rra rrd rrk rrn rrr