-er b-p bbb bbe bbh bbi bbn bbo bbp bbr bbs be- beb bee beh bei ben beo bep ber bes bhb bhe bhh bhi bho bhp bhr bhs bi- bib bie bih bii bin bio bip bir bis bnb bne bni bnn bno bnp bnr bns bob boe boh boi bon boo bop bor bos bpb bpe bph bpi bpn bpo bpp bpr bps brb bre brh bri brn bro brp brr brs bsb bse bsh bsi bsn bso bsp bsr bss ebb ebe ebh ebi ebn ebo ebp ebr ebs eeb eee een eeo eep eer ees ehb ehe ehh ehi ehn eho ehp ehr ehs eib eie eii ein eio eip eir eis en- enb ene enh eni enn eno enp enr ens eo- eob eoe eoh eoi eon eoo eop eor eos ep- epb epe eph epi epn epo epp epr eps erb ere erh eri ern ero erp err ers es- esb ese esh esi esn eso esp esr ess h-i hbb hbe hbh hbi hbn hbo hbp hbr hbs he- heb hee heh hei hen heo hep her hes hhb hhe hhh hhi hhn hho hhp hhr hhs hib hie hih hii hin hio hip hir his hnb hne hnh hnn hno hns hob hoe hoh hoi hon hoo hop hor hos hpb hpe hph hpi hpn hpo hpp hpr hps hr- hrb hre hrh hri hrn hro hrp hrr hrs hsb hse hsh hsi hsn hsp hsr hss ibb ibe ibh ibi ibn ibo ibp ibr ibs ie- iee iei ien iep ier ies ihb ihe ihh ihi ihn iho ihp ihr ihs iib iie iih iii iin iio iip iir iis in- inb ine inh ini inn ino inp inr ins io- iob ioe ioh ioi ion ioo iop ior ios ipb ipe ipi ipn ipo ipp ipr ips ir- irb ire iri irn iro irp irr irs is- isb ise ish isi isn iso isp isr iss n-i nbb nbe nbi nbn nbo nbp nbr nbs ne- neb nee neh nei nen neo nep ner nes nhb nhe nhh nhi nhn nhp nhr nhs nib nie nih nii nin nio nip nir nis nnb nne nnh nni nnn nno nnp nns no- nob noe noh noi non noo nop nor nos npb npe nph npi npn npo npp npr nps nrb nre nri nrn nro nrp nrr nrs nsb nse nsh nsi nsn nso nsp nsr nss o-i ob- obb obe obh obi obn obo obp obr obs oeb oee oeh oei oen oeo oep oer oes ohe ohh ohi ohn oho ohp ohr ohs oib oie oii oin oio oip oir ois on- onb one onh oni onn ono onp onr ons oo- oob ooh ooi oon ooo oop oor oos op- opb ope oph opi opn opo opp opr ops or- orb ore orh ori orn oro orp orr ors os- osb ose osh osi osn oso osp osr oss p-p pbb pbe pbi pbn pbo pbp pbr pbs peb pee peh pei pen peo pep per pes phb phe phi phn pho php phr phs pib pie pih pii pin pio pip pir pis pn- pnb pne pnh pni pnn pno pnp pnr pns pob poe poh poi pon poo pop por pos ppb ppe pph ppi ppn ppo ppp ppr pps prb pre prh pri prn pro prp prr prs ps- psb pse psh psi psn pso psp psr pss rbb rbe rbh rbi rbn rbo rbp rbr rbs re- reb ree reh rei ren reo rep rer res rh- rhb rhe rhh rhi rhn rho rhp rhr rhs rib rie rih rii rin rio rip rir ris rnb rnh rni rnn rno rnp rnr rns rob roe roh roi ron roo rop ror ros rpb rpe rph rpi rpn rpo rpp rpr rps rrb rrh rri rrn rrp rrr rrs rsb rse rsh rsi rsn rso rsp rsr rss sbb sbe sbh sbi sbn sbo sbp sbr sbs se- seb see seh sei sen seo sep ser ses sh- shb she shh shi shn sho shp shr shs sib sie sih sii sin sio sip sir sis snb sne sni snn sno snp snr sns sob soe soh soi son soo sop sor sos spb spe sph spi spn spo spp spr sps sr- srb sre srh sri srn sro srp srr srs ss- ssb sse ssh ssi ssn sso ssp ssr sss