-er b-u bbb bbc bbd bbe bbh bbn bbr bbu bcb bcc bcd bce bch bcn bcr bcu bdb bdc bdd bde bdh bdr bdu be- beb bec bed bee beh ben ber beu bhb bhc bhd bhe bhh bhr bhu bnb bnc bnd bne bnn bnr bnu brb brd bre brh brn brr bru bub buc bud bue buh bun bur buu c-- cbb cbc cbd cbe cbh cbn cbr cbu ccb ccc ccd cce cch ccn ccr ccu cdb cdc cdd cde cdh cdn cdr cdu ce- ceb cec ced cee ceh cen cer ceu ch- chb chc chd che chh chn chr chu cn- cnb cnc cnd cne cnh cnn cnr cnu crb crc crd cre crh crn crr cru cub cuc cud cue cuh cun cur cuu dbb dbc dbd dbe dbh dbn dbr dbu dcb dcc dcd dce dcn dcr dcu ddb ddc ddd dde ddh ddn ddr ddu de- deb dec ded dee deh den der deu dh- dhb dhc dhd dhe dhh dhr dhu dnb dnc dnd dne dnh dnn dnr drb drc drd dre drn drr dru dub duc dud due duh dun dur ebb ebc ebd ebe ebh ebn ebr ebu ec- ecb ecc ecd ece ech ecn ecr ecu ed- edb edc edd ede edh edn edr edu eeb eec eed eee een eer ehb ehc ehd ehe ehh ehn ehr ehu en- enb enc end ene enh enn enr enu erb erc erd ere erh ern err eru eu- eub euc eud eue eun eur hbb hbc hbd hbe hbh hbn hbr hbu hcb hcc hcd hce hch hcn hcr hdb hdc hdd hde hdh hdn hdr hdu he- heb hec hed hee heh hen her heu hhb hhc hhd hhe hhh hhn hhr hhu hnb hnc hnd hne hnh hnn hnu hr- hrb hrc hrd hre hrh hrn hrr hru hub huc hud hue huh hun hur huu nbb nbc nbd nbe nbn nbr nbu ncb ncc ncd nce nch ncn ncr ncu ndb ndc ndd nde ndh ndn ndr ndu ne- neb nec ned nee neh nen ner neu nhb nhc nhd nhe nhh nhn nhr nhu nnb nnc nne nnh nnn nnu nrb nrc nrd nre nrn nrr nru nub nuc nud nue nuh nun nur nuu rbb rbc rbd rbe rbh rbn rbr rbu rcb rcc rcd rce rch rcn rcr rcu rdb rdc rdd rde rdh rdn rdr rdu re- reb rec red ree reh ren rer reu rh- rhb rhc rhd rhe rhh rhn rhr rhu rnb rnc rnd rnh rnn rnr rnu rrb rrc rrd rrh rrn rrr rru rub ruc rud rue ruh run rur ruu ubb ubc ube ubh ubn ubr ubu ucb ucc ucd uce uch ucn ucr ucu udb udc udd ude udn udr udu ueb uec ued uee ueh uen uer uhb uhc uhd uhe uhh uhr uhu un- unb unc und une unh unn unr unu ur- urb urc urd ure urn urr uru uuc uue uun uur uuu