-er a-a a-b aaa aab aad aae aah aan aao aar ab- aba abb abd abe abh abn abo abr ad- ada adb add ade adh adn ado adr aea aeb aed aee aeh aen aeo aer aha ahb ahd ahe ahh ahn aho ahr an- ana anb and ane anh ann ano anr aoa aob aod aoe aoh aon aoo aor ar- ara arb ard are arh arn aro arr baa bab bad bae bah ban bao bar bba bbb bbd bbe bbh bbn bbo bbr bda bdb bdd bde bdh bdo bdr be- bea beb bed bee beh ben beo ber bha bhb bhd bhe bhh bho bhr bna bnb bnd bne bnn bno bnr boa bob bod boe boh bon boo bor bra brb brd bre brh brn bro brr daa dab dad dae dah dan dao dar dba dbb dbd dbe dbh dbn dbo dbr dda ddb ddd dde ddh ddn ddo ddr de- dea deb ded dee deh den deo der dh- dha dhb dhd dhe dhh dho dhr dna dnb dnd dne dnh dnn dno dnr doa dob dod doe doh don doo dor dra drb drd dre drn dro drr eaa eab ead eae eah ean eao ear eba ebb ebd ebe ebh ebn ebo ebr ed- eda edb edd ede edh edn edo edr eea eeb eed eee een eeo eer eha ehb ehd ehe ehh ehn eho ehr en- ena enb end ene enh enn eno enr eo- eoa eob eod eoe eoh eon eoo eor era erb erd ere erh ern ero err haa hab had hae hah han hao har hba hbb hbd hbe hbh hbn hbo hbr hda hdb hdd hde hdh hdn hdo hdr he- hea heb hed hee heh hen heo her hha hhb hhd hhe hhh hhn hho hhr hna hnb hnd hne hnh hnn hno hoa hob hod hoe hoh hon hoo hor hr- hra hrb hrd hre hrh hrn hro hrr naa nab nad nae nah nan nao nar nba nbb nbd nbe nbn nbo nbr nda ndb ndd nde ndh ndn ndo ndr ne- nea neb ned nee neh nen neo ner nha nhb nhd nhe nhh nhn nhr nna nnb nne nnh nnn nno no- noa nob nod noe noh non noo nor nra nrb nrd nre nrn nro nrr oaa oab oad oae oah oan oao oar ob- oba obb obd obe obh obn obo obr oda odb odd ode odh odn odo odr oea oeb oed oee oeh oen oeo oer oha ohd ohe ohh ohn oho ohr on- ona onb ond one onh onn ono onr oo- ooa oob ood ooh oon ooo oor or- ora orb ord ore orh orn oro orr ra- raa rab rad rae rah ran rao rar rba rbb rbd rbe rbh rbn rbo rbr rda rdb rdd rde rdh rdn rdo rdr re- rea reb red ree reh ren reo rer rh- rha rhb rhd rhe rhh rhn rho rhr rna rnb rnd rnh rnn rno rnr roa rob rod roe roh ron roo ror rra rrb rrd rrh rrn rrr