-er b-u bbb bbe bbh bbn bbo bbr bbu be- beb bee beh ben beo ber beu bhb bhe bhh bho bhr bhu bnb bne bnn bno bnr bnu bob boe boh bon boo bor bou brb bre brh brn bro brr bru bub bue buh bun buo bur buu ebb ebe ebh ebn ebo ebr ebu eeb eee een eeo eer ehb ehe ehh ehn eho ehr ehu en- enb ene enh enn eno enr enu eo- eob eoe eoh eon eoo eor eou erb ere erh ern ero err eru eu- eub eue eun eur hbb hbe hbh hbn hbo hbr hbu he- heb hee heh hen heo her heu hhb hhe hhh hhn hho hhr hhu hnb hne hnh hnn hno hnu hob hoe hoh hon hoo hor hou hr- hrb hre hrh hrn hro hrr hru hub hue huh hun huo hur huu nbb nbe nbn nbo nbr nbu ne- neb nee neh nen neo ner neu nhb nhe nhh nhn nhr nhu nnb nne nnh nnn nno nnu no- nob noe noh non noo nor nou nrb nre nrn nro nrr nru nub nue nuh nun nuo nur nuu ob- obb obe obh obn obo obr obu oeb oee oeh oen oeo oer ohe ohh ohn oho ohr ohu on- onb one onh onn ono onr onu oo- oob ooh oon ooo oor or- orb ore orh orn oro orr oru ou- oue ouh oun ouo our rbb rbe rbh rbn rbo rbr rbu re- reb ree reh ren reo rer reu rh- rhb rhe rhh rhn rho rhr rhu rnb rnh rnn rno rnr rnu rob roe roh ron roo ror rou rrb rrh rrn rrr rru rub rue ruh run ruo rur ruu ubb ube ubh ubn ubo ubr ubu ueb uee ueh uen uer uhb uhe uhh uho uhr uhu un- unb une unh unn uno unr unu uob uoe uon uoo uor ur- urb ure urn uro urr uru uue uun uur uuu