-er a-a a-b a-c aaa aab aac aad aae aah aan aar aau ab- aba abb abc abd abe abh abn abr abu ac- aca acb acc acd ace ach acn acr acu ad- ada adb adc add ade adh adn adr adu aea aeb aec aed aee aeh aen aer aeu aha ahb ahc ahd ahe ahh ahn ahr ahu an- ana anb anc and ane anh ann anr anu ar- ara arb arc ard are arh arn arr aru au- aua aub auc aud aue auh aun aur b-u baa bab bac bad bae bah ban bar bau bba bbb bbc bbd bbe bbh bbn bbr bbu bca bcb bcc bcd bce bch bcn bcr bcu bda bdb bdc bdd bde bdh bdr bdu be- bea beb bec bed bee beh ben ber beu bha bhb bhc bhd bhe bhh bhr bhu bna bnb bnc bnd bne bnn bnr bnu bra brb brd bre brh brn brr bru bua bub buc bud bue buh bun bur buu c-- caa cab cac cad cae cah can car cau cba cbb cbc cbd cbe cbh cbn cbr cbu cca ccb ccc ccd cce cch ccn ccr ccu cda cdb cdc cdd cde cdh cdn cdr cdu ce- cea ceb cec ced cee ceh cen cer ceu ch- cha chb chc chd che chh chn chr chu cn- cna cnb cnc cnd cne cnh cnn cnr cnu cra crb crc crd cre crh crn crr cru cua cub cuc cud cue cuh cun cur cuu daa dab dac dad dae dah dan dar dau dba dbb dbc dbd dbe dbh dbn dbr dbu dca dcb dcc dcd dce dcn dcr dcu dda ddb ddc ddd dde ddh ddn ddr ddu de- dea deb dec ded dee deh den der deu dh- dha dhb dhc dhd dhe dhh dhr dhu dna dnb dnc dnd dne dnh dnn dnr dra drb drc drd dre drn drr dru dua dub duc dud due duh dun dur eaa eab eac ead eae eah ean ear eau eba ebb ebc ebd ebe ebh ebn ebr ebu ec- eca ecb ecc ecd ece ech ecn ecr ecu ed- eda edb edc edd ede edh edn edr edu eea eeb eec eed eee een eer eha ehb ehc ehd ehe ehh ehn ehr ehu en- ena enb enc end ene enh enn enr enu era erb erc erd ere erh ern err eru eu- eua eub euc eud eue eun eur haa hab hac had hae hah han har hau hba hbb hbc hbd hbe hbh hbn hbr hbu hca hcb hcc hcd hce hch hcn hcr hda hdb hdc hdd hde hdh hdn hdr hdu he- hea heb hec hed hee heh hen her heu hha hhb hhc hhd hhe hhh hhn hhr hhu hna hnb hnc hnd hne hnh hnn hnu hr- hra hrb hrc hrd hre hrh hrn hrr hru hua hub huc hud hue huh hun hur huu naa nab nac nad nae nah nan nar nau nba nbb nbc nbd nbe nbn nbr nbu nca ncb ncc ncd nce nch ncn ncr ncu nda ndb ndc ndd nde ndh ndn ndr ndu ne- nea neb nec ned nee neh nen ner neu nha nhb nhc nhd nhe nhh nhn nhr nhu nna nnb nnc nne nnh nnn nnu nra nrb nrc nrd nre nrn nrr nru nua nub nuc nud nue nuh nun nur nuu ra- raa rab rac rad rae rah ran rar rau rba rbb rbc rbd rbe rbh rbn rbr rbu rca rcb rcc rcd rce rch rcn rcr rcu rda rdb rdc rdd rde rdh rdn rdr rdu re- rea reb rec red ree reh ren rer reu rh- rha rhb rhc rhd rhe rhh rhn rhr rhu rna rnb rnc rnd rnh rnn rnr rnu rra rrb rrc rrd rrh rrn rrr rru rua rub ruc rud rue ruh run rur ruu ua- uaa uab uac uad uae uah uan uar uau uba ubb ubc ube ubh ubn ubr ubu uca ucb ucc ucd uce uch ucn ucr ucu uda udb udc udd ude udn udr udu uea ueb uec ued uee ueh uen uer uha uhb uhc uhd uhe uhh uhr uhu un- una unb unc und une unh unn unr unu ur- ura urb urc urd ure urn urr uru uua uuc uue uun uur uuu