-er b-p bbb bbe bbi bbn bbo bbp bbr bbs bbt be- beb bee bei ben beo bep ber bes bet bi- bib bie bii bin bio bip bir bis bit bnb bne bni bnn bno bnp bnr bns bnt bob boe boi bon boo bop bor bos bot bpb bpe bpi bpn bpo bpp bpr bps bpt brb bre bri brn bro brp brr brs brt bsb bse bsi bsn bso bsp bsr bss bst btb bte bti btn bto btp btr bts btt ebb ebe ebi ebn ebo ebp ebr ebs ebt eeb eee een eeo eep eer ees eet eib eie eii ein eio eip eir eis eit en- enb ene eni enn eno enp enr ens ent eo- eob eoe eoi eon eoo eop eor eos eot ep- epb epe epi epn epo epp epr eps ept erb ere eri ern ero erp err ers ert es- esb ese esi esn eso esp esr ess est etb ete eti etn eto etp etr ets ett ibb ibe ibi ibn ibo ibp ibr ibs ibt ie- iee iei ien iep ier ies iet iib iie iii iin iio iip iir iis iit in- inb ine ini inn ino inp inr ins int io- iob ioe ioi ion ioo iop ior ios iot ipb ipe ipi ipn ipo ipp ipr ips ipt ir- irb ire iri irn iro irp irr irs irt is- isb ise isi isn iso isp isr iss ist itb ite iti itn ito itp its itt n-i nbb nbe nbi nbn nbo nbp nbr nbs nbt ne- neb nee nei nen neo nep ner nes net nib nie nii nin nio nip nir nis nit nnb nne nni nnn nno nnp nns nnt no- nob noe noi non noo nop nor nos not npb npe npi npn npo npp npr nps npt nrb nre nri nrn nro nrp nrr nrs nrt nsb nse nsi nsn nso nsp nsr nss nst ntb nte nti ntn nto ntp ntr nts ntt o-i ob- obb obe obi obn obo obp obr obs obt oeb oee oei oen oeo oep oer oes oet oib oie oii oin oio oip oir ois oit on- onb one oni onn ono onp onr ons ont oo- oob ooi oon ooo oop oor oos oot op- opb ope opi opn opo opp opr ops opt or- orb ore ori orn oro orp orr ors ort os- osb ose osi osn oso osp osr oss ost ot- otb ote oti otn oto otp otr ots ott p-p pbb pbe pbi pbn pbo pbp pbr pbs pbt peb pee pei pen peo pep per pes pet pib pie pii pin pio pip pir pis pit pn- pnb pne pni pnn pno pnp pnr pns pnt pob poe poi pon poo pop por pos pot ppb ppe ppi ppn ppo ppp ppr pps ppt prb pre pri prn pro prp prr prs prt ps- psb pse psi psn pso psp psr pss pst pt- ptb pte pti ptn pto ptp ptr pts ptt rbb rbe rbi rbn rbo rbp rbr rbs rbt re- reb ree rei ren reo rep rer res ret rib rie rii rin rio rip rir ris rit rnb rni rnn rno rnp rnr rns rnt rob roe roi ron roo rop ror ros rot rpb rpe rpi rpn rpo rpp rpr rps rpt rrb rri rrn rrp rrr rrs rrt rsb rse rsi rsn rso rsp rsr rss rst rtb rte rti rtn rto rtp rtr rts rtt sbb sbe sbi sbn sbo sbp sbr sbs sbt se- seb see sei sen seo sep ser ses set sib sie sii sin sio sip sir sis sit snb sne sni snn sno snp snr sns snt sob soe soi son soo sop sor sos sot spb spe spi spn spo spp spr sps spt sr- srb sre sri srn sro srp srr srs srt ss- ssb sse ssi ssn sso ssp ssr sss sst stb ste sti stn sto stp str sts stt tbb tbe tbi tbn tbo tbp tbr tbs tbt te- teb tee tei ten teo tep ter tes tet tib tie tii tin tio tip tir tis tit tnb tne tni tnn tno tnp tnr tns tnt to- tob toe toi ton too top tor tos tot tpb tpe tpi tpn tpo tpp tpr tps tpt trb tre tri trn tro trp trr trs trt tsb tse tsi tsn tso tsp tsr tss tst ttb tte tti ttn tto ttp ttr tts ttt