-er bbb bbe bbh bbn bbo bbr be- beb bee beh ben beo ber bhb bhe bhh bho bhr bnb bne bnn bno bnr bob boe boh bon boo bor brb bre brh brn bro brr ebb ebe ebh ebn ebo ebr eeb eee een eeo eer ehb ehe ehh ehn eho ehr en- enb ene enh enn eno enr eo- eob eoe eoh eon eoo eor erb ere erh ern ero err hbb hbe hbh hbn hbo hbr he- heb hee heh hen heo her hhb hhe hhh hhn hho hhr hnb hne hnh hnn hno hob hoe hoh hon hoo hor hr- hrb hre hrh hrn hro hrr nbb nbe nbn nbo nbr ne- neb nee neh nen neo ner nhb nhe nhh nhn nhr nnb nne nnh nnn nno no- nob noe noh non noo nor nrb nre nrn nro nrr ob- obb obe obh obn obo obr oeb oee oeh oen oeo oer ohe ohh ohn oho ohr on- onb one onh onn ono onr oo- oob ooh oon ooo oor or- orb ore orh orn oro orr rbb rbe rbh rbn rbo rbr re- reb ree reh ren reo rer rh- rhb rhe rhh rhn rho rhr rnb rnh rnn rno rnr rob roe roh ron roo ror rrb rrh rrn rrr