-er a-a a-b aaa aab aad aae aaj aan aar ab- aba abb abd abe abj abn abr ad- ada adb add ade adj adn adr aea aeb aed aee aej aen aer aja ajb ajd aje ajj ajn ajr an- ana anb and ane anj ann anr ar- ara arb ard are arj arn arr baa bab bad bae baj ban bar bba bbb bbd bbe bbn bbr bda bdb bdd bde bdj bdr be- bea beb bed bee ben ber bja bjd bjj bjn bjr bna bnb bnd bne bnj bnn bnr bra brb brd bre brj brn brr daa dab dad dae daj dan dar dba dbb dbd dbe dbn dbr dda ddb ddd dde ddn ddr de- dea deb ded dee dej den der dj- dja djb djd dje dna dnb dnd dne dnj dnn dnr dra drb drd dre drj drn drr eaa eab ead eae eaj ean ear eba ebb ebd ebe ebj ebn ebr ed- eda edb edd ede edj edn edr eea eeb eed eee een eer eja ejd en- ena enb end ene enn enr era erb erd ere ern err j-d jaa jab jad jae jaj jan jar jba jbj jbr jda jdb jde jdn jdr jea jeb jed jee jej jen jer jja jjb jjj jjr jna jnd jne jnj jnn jnr jra jrb jrn jrr naa nab nad nae naj nan nar nba nbb nbd nbe nbn nbr nda ndb ndd nde ndn ndr ne- nea neb ned nee nej nen ner nja nje njn nna nnb nne nnn nra nrb nrd nre nrj nrn nrr ra- raa rab rad rae raj ran rar rba rbb rbd rbe rbn rbr rda rdb rdd rde rdj rdn rdr re- rea reb red ree ren rer rja rjr rna rnb rnd rnn rnr rra rrb rrd rrn rrr