b-p bbb bbe bbi bbn bbo bbp bbs bbt be- beb bee bei ben beo bep bes bet bi- bib bie bii bin bio bip bis bit bnb bne bni bnn bno bnp bns bnt bob boe boi bon boo bop bos bot bpb bpe bpi bpn bpo bpp bps bpt bsb bse bsi bsn bso bsp bss bst btb bte bti btn bto btp bts btt ebb ebe ebi ebn ebo ebp ebs ebt eeb eee een eeo eep ees eet eib eie eii ein eio eip eis eit en- enb ene eni enn eno enp ens ent eo- eob eoe eoi eon eoo eop eos eot ep- epb epe epi epn epo epp eps ept es- esb ese esi esn eso esp ess est etb ete eti etn eto etp ets ett ibb ibe ibi ibn ibo ibp ibs ibt ie- iee iei ien iep ies iet iib iie iii iin iio iip iis iit in- inb ine ini inn ino inp ins int io- iob ioe ioi ion ioo iop ios iot ipb ipe ipi ipn ipo ipp ips ipt is- isb ise isi isn iso isp iss ist itb ite iti itn ito itp its itt n-i nbb nbe nbi nbn nbo nbp nbs nbt ne- neb nee nei nen neo nep nes net nib nie nii nin nio nip nis nit nnb nne nni nnn nno nnp nns nnt no- nob noe noi non noo nop nos not npb npe npi npn npo npp nps npt nsb nse nsi nsn nso nsp nss nst ntb nte nti ntn nto ntp nts ntt o-i ob- obb obe obi obn obo obp obs obt oeb oee oei oen oeo oep oes oet oib oie oii oin oio oip ois oit on- onb one oni onn ono onp ons ont oo- oob ooi oon ooo oop oos oot op- opb ope opi opn opo opp ops opt os- osb ose osi osn oso osp oss ost ot- otb ote oti otn oto otp ots ott p-p pbb pbe pbi pbn pbo pbp pbs pbt peb pee pei pen peo pep pes pet pib pie pii pin pio pip pis pit pn- pnb pne pni pnn pno pnp pns pnt pob poe poi pon poo pop pos pot ppb ppe ppi ppn ppo ppp pps ppt ps- psb pse psi psn pso psp pss pst pt- ptb pte pti ptn pto ptp pts ptt sbb sbe sbi sbn sbo sbp sbs sbt se- seb see sei sen seo sep ses set sib sie sii sin sio sip sis sit snb sne sni snn sno snp sns snt sob soe soi son soo sop sos sot spb spe spi spn spo spp sps spt ss- ssb sse ssi ssn sso ssp sss sst stb ste sti stn sto stp sts stt tbb tbe tbi tbn tbo tbp tbs tbt te- teb tee tei ten teo tep tes tet tib tie tii tin tio tip tis tit tnb tne tni tnn tno tnp tns tnt to- tob toe toi ton too top tos tot tpb tpe tpi tpn tpo tpp tps tpt tsb tse tsi tsn tso tsp tss tst ttb tte tti ttn tto ttp tts ttt