-er b-p bbb bbe bbf bbi bbn bbo bbp bbr bbs bbx be- beb bee bef bei ben beo bep ber bes bex bfb bfe bff bfi bfn bfo bfp bfr bfs bfx bi- bib bie bif bii bin bio bip bir bis bix bnb bne bnf bni bnn bno bnp bnr bns bnx bob boe bof boi bon boo bop bor bos box bpb bpe bpf bpi bpn bpo bpp bpr bps bpx brb bre brf bri brn bro brp brr brs brx bsb bse bsf bsi bsn bso bsp bsr bss bsx bxb bxi bxn bxo bxx ebb ebe ebf ebi ebn ebo ebp ebr ebs ebx eeb eee eef een eeo eep eer ees eex ef- efb efe eff efi efo efp efr efs efx eib eie eif eii ein eio eip eir eis eix en- enb ene enf eni enn eno enp enr ens eo- eob eoe eof eoi eon eoo eop eor eos ep- epb epe epf epi epn epo epp epr eps epx erb ere erf eri ern ero erp err ers es- esb ese esf esi esn eso esp esr ess esx ex- exe exi exo exp exr exs exx fbb fbe fbf fbi fbn fbo fbp fbr fbs fbx feb fee fef fei fen feo fep fer fes fex ffe fff ffi ffn ffo ffp ffr ffs ffx fib fie fif fii fin fip fir fis fix fnb fne fnf fni fnn fnp fnr fns fnx fob foe fof foi fon foo fop for fos fox fpb fpe fpi fpn fpo fpp fpr fps fpx frb fre frf fri frn fro frp frr frs fsb fse fsf fsi fsn fso fsp fsr fss fsx fxe fxi fxp fxr fxs fxx i-f ibb ibe ibf ibi ibn ibo ibp ibr ibs ibx ie- iee ief iei ien iep ier ies iex ifb ife iff ifi ifn ifo ifp ifr ifs ifx iib iie iif iii iin iio iip iir iis iix in- inb ine inf ini inn ino inp inr ins inx io- iob ioe iof ioi ion ioo iop ior ios ipb ipe ipf ipi ipn ipo ipp ipr ips ipx ir- irb ire irf iri irn iro irp irr irs irx is- isb ise isf isi isn iso isp isr iss ixe ixi ixn n-i nbb nbe nbf nbi nbn nbo nbp nbr nbs nbx ne- neb nee nef nei nen neo nep ner nes nex nfb nfe nff nfi nfn nfo nfp nfr nfs nib nie nif nii nin nio nip nir nis nix nnb nne nnf nni nnn nno nnp nns no- nob noe nof noi non noo nop nor nos nox npb npe npf npi npn npo npp npr nps nrb nre nrf nri nrn nro nrp nrr nrs nrx nsb nse nsf nsi nsn nso nsp nsr nss nsx o-i ob- obb obe obf obi obn obo obp obr obs obx oeb oee oef oei oen oeo oep oer oes oex of- ofb ofe off ofi ofn ofo ofp ofr ofs ofx oib oie oif oii oin oio oip oir ois on- onb one onf oni onn ono onp onr ons onx oo- oob oof ooi oon ooo oop oor oos oox op- opb ope opf opi opn opo opp opr ops opx or- orb ore orf ori orn oro orp orr ors orx os- osb ose osf osi osn oso osp osr oss osx ox- oxb oxf oxi oxn oxo oxx p-p pbb pbe pbf pbi pbn pbo pbp pbr pbs pbx peb pee pef pei pen peo pep per pes pex pfb pfe pff pfi pfn pfo pfp pfr pfs pfx pib pie pif pii pin pio pip pir pis pix pn- pnb pne pnf pni pnn pno pnp pnr pns pnx pob poe pof poi pon poo pop por pos pox ppb ppe ppf ppi ppn ppo ppp ppr pps ppx prb pre prf pri prn pro prp prr prs prx ps- psb pse psf psi psn pso psp psr pss psx pxe pxr pxs rbb rbe rbf rbi rbn rbo rbp rbr rbs rbx re- reb ree ref rei ren reo rep rer res rex rfb rfe rff rfi rfn rfo rfp rfr rfs rib rie rif rii rin rio rip rir ris rix rnb rni rnn rno rnp rnr rns rob roe rof roi ron roo rop ror ros rox rpb rpe rpf rpi rpn rpo rpp rpr rps rpx rrb rrf rri rrn rrp rrr rrs rsb rse rsf rsi rsn rso rsp rsr rss rsx rxp rxr rxs sbb sbe sbf sbi sbn sbo sbp sbr sbs sbx se- seb see sef sei sen seo sep ser ses sex sfb sfe sff sfi sfn sfo sfp sfr sfs sfx sib sie sif sii sin sio sip sir sis six snb sne snf sni snn sno snp snr sns sob soe sof soi son soo sop sor sos sox spb spe spf spi spn spo spp spr sps spx sr- srb sre srf sri srn sro srp srr srs srx ss- ssb sse ssf ssi ssn sso ssp ssr sss ssx sxi sxn sxs xbe xbr xbx xee xen xep xer xes xex xfe xfn xfs xfx xie xii xin xio xis xix xno xns xof xoi xon xoo xop xor xos xox xpb xpe xpf xpn xpo xpp xps xrf xrx xsb xsi xsp xss xxi xxo xxp xxx