-er a-a a-b aaa aab aad aae aah aan aar ab- aba abb abd abe abh abn abr ad- ada adb add ade adh adn adr aea aeb aed aee aeh aen aer aha ahb ahd ahe ahh ahn ahr an- ana anb and ane anh ann anr ar- ara arb ard are arh arn arr baa bab bad bae bah ban bar bba bbb bbd bbe bbh bbn bbr bda bdb bdd bde bdh bdr be- bea beb bed bee beh ben ber bha bhb bhd bhe bhh bhr bna bnb bnd bne bnn bnr bra brb brd bre brh brn brr daa dab dad dae dah dan dar dba dbb dbd dbe dbh dbn dbr dda ddb ddd dde ddh ddn ddr de- dea deb ded dee deh den der dh- dha dhb dhd dhe dhh dhr dna dnb dnd dne dnh dnn dnr dra drb drd dre drn drr eaa eab ead eae eah ean ear eba ebb ebd ebe ebh ebn ebr ed- eda edb edd ede edh edn edr eea eeb eed eee een eer eha ehb ehd ehe ehh ehn ehr en- ena enb end ene enh enn enr era erb erd ere erh ern err haa hab had hae hah han har hba hbb hbd hbe hbh hbn hbr hda hdb hdd hde hdh hdn hdr he- hea heb hed hee heh hen her hha hhb hhd hhe hhh hhn hhr hna hnb hnd hne hnh hnn hr- hra hrb hrd hre hrh hrn hrr naa nab nad nae nah nan nar nba nbb nbd nbe nbn nbr nda ndb ndd nde ndh ndn ndr ne- nea neb ned nee neh nen ner nha nhb nhd nhe nhh nhn nhr nna nnb nne nnh nnn nra nrb nrd nre nrn nrr ra- raa rab rad rae rah ran rar rba rbb rbd rbe rbh rbn rbr rda rdb rdd rde rdh rdn rdr re- rea reb red ree reh ren rer rh- rha rhb rhd rhe rhh rhn rhr rna rnb rnd rnh rnn rnr rra rrb rrd rrh rrn rrr