b-p bbb bbe bbi bbn bbp bbs bbt be- beb bee bei ben bep bes bet bi- bib bie bii bin bip bis bit bnb bne bni bnn bnp bns bnt bpb bpe bpi bpn bpp bps bpt bsb bse bsi bsn bsp bss bst btb bte bti btn btp bts btt ebb ebe ebi ebn ebp ebs ebt eeb eee een eep ees eet eib eie eii ein eip eis eit en- enb ene eni enn enp ens ent ep- epb epe epi epn epp eps ept es- esb ese esi esn esp ess est etb ete eti etn etp ets ett ibb ibe ibi ibn ibp ibs ibt ie- iee iei ien iep ies iet iib iie iii iin iip iis iit in- inb ine ini inn inp ins int ipb ipe ipi ipn ipp ips ipt is- isb ise isi isn isp iss ist itb ite iti itn itp its itt n-i nbb nbe nbi nbn nbp nbs nbt ne- neb nee nei nen nep nes net nib nie nii nin nip nis nit nnb nne nni nnn nnp nns nnt npb npe npi npn npp nps npt nsb nse nsi nsn nsp nss nst ntb nte nti ntn ntp nts ntt p-p pbb pbe pbi pbn pbp pbs pbt peb pee pei pen pep pes pet pib pie pii pin pip pis pit pn- pnb pne pni pnn pnp pns pnt ppb ppe ppi ppn ppp pps ppt ps- psb pse psi psn psp pss pst pt- ptb pte pti ptn ptp pts ptt sbb sbe sbi sbn sbp sbs sbt se- seb see sei sen sep ses set sib sie sii sin sip sis sit snb sne sni snn snp sns snt spb spe spi spn spp sps spt ss- ssb sse ssi ssn ssp sss sst stb ste sti stn stp sts stt tbb tbe tbi tbn tbp tbs tbt te- teb tee tei ten tep tes tet tib tie tii tin tip tis tit tnb tne tni tnn tnp tns tnt tpb tpe tpi tpn tpp tps tpt tsb tse tsi tsn tsp tss tst ttb tte tti ttn ttp tts ttt