-er b-p bbb bbe bbg bbi bbn bbo bbp bbr bbs be- beb bee beg bei ben beo bep ber bes bgb bge bgg bgi bgn bgo bgp bgr bgs bi- bib bie big bii bin bio bip bir bis bnb bne bng bni bnn bno bnp bnr bns bob boe bog boi bon boo bop bor bos bpb bpe bpg bpi bpn bpo bpp bpr bps brb bre brg bri brn bro brp brr brs bsb bse bsg bsi bsn bso bsp bsr bss ebb ebe ebg ebi ebn ebo ebp ebr ebs eeb eee eeg een eeo eep eer ees egb ege egg egi egn ego egp egr egs eib eie eig eii ein eio eip eir eis en- enb ene eng eni enn eno enp enr ens eo- eob eoe eog eoi eon eoo eop eor eos ep- epb epe epg epi epn epo epp epr eps erb ere erg eri ern ero erp err ers es- esb ese esg esi esn eso esp esr ess g-p gbe gbg gbi gbn gbo gbp gbr gbs ge- geb gee geg gei gen geo gep ger ges ggb ggg ggi ggn ggo ggp ggr ggs gib gie gig gii gin gio gip gir gis gnb gne gni gnn gno gnp gnr gns gob goe gog goi gon goo gop gor gos gpb gpe gpg gpi gpn gpo gpp gpr gps grb gre grg gri grn gro grp grr grs gsb gse gsg gsi gsn gso gsp gsr gss ibb ibe ibg ibi ibn ibo ibp ibr ibs ie- iee ieg iei ien iep ier ies igb ige igg igi ign igo igp igr igs iib iie iii iin iio iip iir iis in- inb ine ing ini inn ino inp inr ins io- iob ioe iog ioi ion ioo iop ior ios ipb ipe ipg ipi ipn ipo ipp ipr ips ir- irb ire irg iri irn iro irp irr irs is- isb ise isg isi isn iso isp isr iss n-i nbb nbe nbg nbi nbn nbo nbp nbr nbs ne- neb nee neg nei nen neo nep ner nes ngb nge ngg ngi ngn ngo ngp ngs nib nie nig nii nin nio nip nir nis nnb nne nng nni nnn nno nnp nns no- nob noe nog noi non noo nop nor nos npb npe npg npi npn npo npp npr nps nrb nre nrg nri nrn nro nrp nrr nrs nsb nse nsg nsi nsn nso nsp nsr nss o-i ob- obb obe obg obi obn obo obp obr obs oeb oee oeg oei oen oeo oep oer oes oge ogg ogi ogn ogo ogp ogs oib oie oii oin oio oip oir ois on- onb one ong oni onn ono onp onr ons oo- oob oog ooi oon ooo oop oor oos op- opb ope opg opi opn opo opp opr ops or- orb ore org ori orn oro orp orr ors os- osb ose osg osi osn oso osp osr oss p-p pbb pbe pbg pbi pbn pbo pbp pbr pbs peb pee peg pei pen peo pep per pes pgb pge pgg pgi pgn pgo pgp pgr pgs pib pie pig pii pin pio pip pir pis pn- pnb pne png pni pnn pno pnp pnr pns pob poe pog poi pon poo pop por pos ppb ppe ppg ppi ppn ppo ppp ppr pps prb pre prg pri prn pro prp prr prs ps- psb pse psg psi psn pso psp psr pss rbb rbe rbg rbi rbn rbo rbp rbr rbs re- reb ree reg rei ren reo rep rer res rgb rge rgg rgi rgn rgo rgp rgr rgs rib rie rig rii rin rio rip rir ris rnb rng rni rnn rno rnp rnr rns rob roe rog roi ron roo rop ror ros rpb rpe rpg rpi rpn rpo rpp rpr rps rrb rrg rri rrn rrp rrr rrs rsb rse rsg rsi rsn rso rsp rsr rss sbb sbe sbg sbi sbn sbo sbp sbr sbs se- seb see seg sei sen seo sep ser ses sgb sge sgg sgi sgn sgo sgp sgr sgs sib sie sig sii sin sio sip sir sis snb sne sng sni snn sno snp snr sns sob soe sog soi son soo sop sor sos spb spe spg spi spn spo spp spr sps sr- srb sre srg sri srn sro srp srr srs ss- ssb sse ssg ssi ssn sso ssp ssr sss