-er a-a a-b aaa aab aad aae aah aan aao aar aau ab- aba abb abd abe abh abn abo abr abu ad- ada adb add ade adh adn ado adr adu aea aeb aed aee aeh aen aeo aer aeu aha ahb ahd ahe ahh ahn aho ahr ahu an- ana anb and ane anh ann ano anr anu aoa aob aod aoe aoh aon aoo aor aou ar- ara arb ard are arh arn aro arr aru au- aua aub aud aue auh aun auo aur b-u baa bab bad bae bah ban bao bar bau bba bbb bbd bbe bbh bbn bbo bbr bbu bda bdb bdd bde bdh bdo bdr bdu be- bea beb bed bee beh ben beo ber beu bha bhb bhd bhe bhh bho bhr bhu bna bnb bnd bne bnn bno bnr bnu boa bob bod boe boh bon boo bor bou bra brb brd bre brh brn bro brr bru bua bub bud bue buh bun buo bur buu daa dab dad dae dah dan dao dar dau dba dbb dbd dbe dbh dbn dbo dbr dbu dda ddb ddd dde ddh ddn ddo ddr ddu de- dea deb ded dee deh den deo der deu dh- dha dhb dhd dhe dhh dho dhr dhu dna dnb dnd dne dnh dnn dno dnr doa dob dod doe doh don doo dor dou dra drb drd dre drn dro drr dru dua dub dud due duh dun duo dur eaa eab ead eae eah ean eao ear eau eba ebb ebd ebe ebh ebn ebo ebr ebu ed- eda edb edd ede edh edn edo edr edu eea eeb eed eee een eeo eer eha ehb ehd ehe ehh ehn eho ehr ehu en- ena enb end ene enh enn eno enr enu eo- eoa eob eod eoe eoh eon eoo eor eou era erb erd ere erh ern ero err eru eu- eua eub eud eue eun eur haa hab had hae hah han hao har hau hba hbb hbd hbe hbh hbn hbo hbr hbu hda hdb hdd hde hdh hdn hdo hdr hdu he- hea heb hed hee heh hen heo her heu hha hhb hhd hhe hhh hhn hho hhr hhu hna hnb hnd hne hnh hnn hno hnu hoa hob hod hoe hoh hon hoo hor hou hr- hra hrb hrd hre hrh hrn hro hrr hru hua hub hud hue huh hun huo hur huu naa nab nad nae nah nan nao nar nau nba nbb nbd nbe nbn nbo nbr nbu nda ndb ndd nde ndh ndn ndo ndr ndu ne- nea neb ned nee neh nen neo ner neu nha nhb nhd nhe nhh nhn nhr nhu nna nnb nne nnh nnn nno nnu no- noa nob nod noe noh non noo nor nou nra nrb nrd nre nrn nro nrr nru nua nub nud nue nuh nun nuo nur nuu oaa oab oad oae oah oan oao oar oau ob- oba obb obd obe obh obn obo obr obu oda odb odd ode odh odn odo odr odu oea oeb oed oee oeh oen oeo oer oha ohd ohe ohh ohn oho ohr ohu on- ona onb ond one onh onn ono onr onu oo- ooa oob ood ooh oon ooo oor or- ora orb ord ore orh orn oro orr oru ou- oua oud oue ouh oun ouo our ra- raa rab rad rae rah ran rao rar rau rba rbb rbd rbe rbh rbn rbo rbr rbu rda rdb rdd rde rdh rdn rdo rdr rdu re- rea reb red ree reh ren reo rer reu rh- rha rhb rhd rhe rhh rhn rho rhr rhu rna rnb rnd rnh rnn rno rnr rnu roa rob rod roe roh ron roo ror rou rra rrb rrd rrh rrn rrr rru rua rub rud rue ruh run ruo rur ruu ua- uaa uab uad uae uah uan uao uar uau uba ubb ube ubh ubn ubo ubr ubu uda udb udd ude udn udo udr udu uea ueb ued uee ueh uen uer uha uhb uhd uhe uhh uho uhr uhu un- una unb und une unh unn uno unr unu uoa uob uod uoe uon uoo uor ur- ura urb urd ure urn uro urr uru uua uue uun uur uuu