-er a-a a-b aaa aab aad aae aaj aak aan aar ab- aba abb abd abe abj abk abn abr ad- ada adb add ade adj adk adn adr aea aeb aed aee aej aek aen aer aja ajb ajd aje ajj ajk ajn ajr aka akb akd ake akj akk akn akr an- ana anb and ane anj ank ann anr ar- ara arb ard are arj ark arn arr baa bab bad bae baj bak ban bar bba bbb bbd bbe bbk bbn bbr bda bdb bdd bde bdj bdk bdr be- bea beb bed bee bek ben ber bja bjd bjj bjk bjn bjr bka bkb bke bkk bkn bkr bna bnb bnd bne bnj bnk bnn bnr bra brb brd bre brj brk brn brr daa dab dad dae daj dak dan dar dba dbb dbd dbe dbk dbn dbr dda ddb ddd dde ddk ddn ddr de- dea deb ded dee dej dek den der dj- dja djb djd dje djk dka dkb dke dkk dkr dna dnb dnd dne dnj dnk dnn dnr dra drb drd dre drj drk drn drr eaa eab ead eae eaj eak ean ear eba ebb ebd ebe ebj ebk ebn ebr ed- eda edb edd ede edj edk edn edr eea eeb eed eee eek een eer eja ejd eka ekb ekd eke ekr en- ena enb end ene enk enn enr era erb erd ere erk ern err j-d jaa jab jad jae jaj jak jan jar jba jbj jbk jbr jda jdb jde jdn jdr jea jeb jed jee jej jek jen jer jja jjb jjj jjk jjr jka jkb jkk jkn jkr jna jnd jne jnj jnn jnr jra jrb jrk jrn jrr ka- kaa kab kad kae kaj kak kan kar kba kbb kbd kbe kbk kbn kbr kda kdb kde kdk kdr ke- kea keb ked kee kek ken ker kjb kje kjr kkb kke kkk kkn kkr kn- kna knd kne knk knn knr kra krd krk krn krr naa nab nad nae naj nak nan nar nba nbb nbd nbe nbk nbn nbr nda ndb ndd nde ndk ndn ndr ne- nea neb ned nee nej nek nen ner nja nje njk njn nka nke nkj nkk nkn nkr nna nnb nne nnk nnn nra nrb nrd nre nrj nrk nrn nrr ra- raa rab rad rae raj rak ran rar rba rbb rbd rbe rbk rbn rbr rda rdb rdd rde rdj rdn rdr re- rea reb red ree rek ren rer rja rjk rjr rkb rke rkk rna rnb rnd rnn rnr rra rrb rrd rrk rrn rrr