-er b-p bbb bbe bbh bbn bbo bbp bbr be- beb bee beh ben beo bep ber bhb bhe bhh bho bhp bhr bnb bne bnn bno bnp bnr bob boe boh bon boo bop bor bpb bpe bph bpn bpo bpp bpr brb bre brh brn bro brp brr ebb ebe ebh ebn ebo ebp ebr eeb eee een eeo eep eer ehb ehe ehh ehn eho ehp ehr en- enb ene enh enn eno enp enr eo- eob eoe eoh eon eoo eop eor ep- epb epe eph epn epo epp epr erb ere erh ern ero erp err hbb hbe hbh hbn hbo hbp hbr he- heb hee heh hen heo hep her hhb hhe hhh hhn hho hhp hhr hnb hne hnh hnn hno hob hoe hoh hon hoo hop hor hpb hpe hph hpn hpo hpp hpr hr- hrb hre hrh hrn hro hrp hrr nbb nbe nbn nbo nbp nbr ne- neb nee neh nen neo nep ner nhb nhe nhh nhn nhp nhr nnb nne nnh nnn nno nnp no- nob noe noh non noo nop nor npb npe nph npn npo npp npr nrb nre nrn nro nrp nrr ob- obb obe obh obn obo obp obr oeb oee oeh oen oeo oep oer ohe ohh ohn oho ohp ohr on- onb one onh onn ono onp onr oo- oob ooh oon ooo oop oor op- opb ope oph opn opo opp opr or- orb ore orh orn oro orp orr p-p pbb pbe pbn pbo pbp pbr peb pee peh pen peo pep per phb phe phn pho php phr pn- pnb pne pnh pnn pno pnp pnr pob poe poh pon poo pop por ppb ppe pph ppn ppo ppp ppr prb pre prh prn pro prp prr rbb rbe rbh rbn rbo rbp rbr re- reb ree reh ren reo rep rer rh- rhb rhe rhh rhn rho rhp rhr rnb rnh rnn rno rnp rnr rob roe roh ron roo rop ror rpb rpe rph rpn rpo rpp rpr rrb rrh rrn rrp rrr