-er a-a aaa aad aae aak aan aap aar ad- ada add ade adk adn adp adr aea aed aee aek aen aep aer aka akd ake akk akn akp akr an- ana and ane ank ann anp anr ap- apa apd ape apk apn app apr ar- ara ard are ark arn arp arr daa dad dae dak dan dap dar dda ddd dde ddk ddn ddp ddr de- dea ded dee dek den dep der dka dke dkk dkp dkr dna dnd dne dnk dnn dnp dnr dpa dpd dpe dpk dpn dpp dpr dra drd dre drk drn drp drr eaa ead eae eak ean eap ear ed- eda edd ede edk edn edp edr eea eed eee eek een eep eer eka ekd eke ekp ekr en- ena end ene enk enn enp enr ep- epa epd epe epn epp epr era erd ere erk ern erp err ka- kaa kad kae kak kan kap kar kda kde kdk kdp kdr ke- kea ked kee kek ken kep ker kke kkk kkn kkp kkr kn- kna knd kne knk knn knp knr kpa kpd kpe kpk kpn kpp kpr kra krd krk krn krp krr naa nad nae nak nan nap nar nda ndd nde ndk ndn ndp ndr ne- nea ned nee nek nen nep ner nka nke nkk nkn nkp nkr nna nne nnk nnn nnp npa npd npe npn npp npr nra nrd nre nrk nrn nrp nrr p-p paa pad pae pak pan pap par pda pdd pde pdk pdn pdp pdr pea ped pee pek pen pep per pka pkd pke pkn pkp pkr pn- pna pnd pne pnk pnn pnp pnr ppa ppd ppe ppk ppn ppp ppr pra prd pre prk prn prp prr ra- raa rad rae rak ran rap rar rda rdd rde rdn rdp rdr re- rea red ree rek ren rep rer rke rkk rkp rna rnd rnn rnp rnr rpa rpd rpe rpk rpn rpp rpr rra rrd rrk rrn rrp rrr