b-p bbb bbe bbi bbn bbo bbp bbt be- beb bee bei ben beo bep bet bi- bib bie bii bin bio bip bit bnb bne bni bnn bno bnp bnt bob boe boi bon boo bop bot bpb bpe bpi bpn bpo bpp bpt btb bte bti btn bto btp btt ebb ebe ebi ebn ebo ebp ebt eeb eee een eeo eep eet eib eie eii ein eio eip eit en- enb ene eni enn eno enp ent eo- eob eoe eoi eon eoo eop eot ep- epb epe epi epn epo epp ept etb ete eti etn eto etp ett ibb ibe ibi ibn ibo ibp ibt ie- iee iei ien iep iet iib iie iii iin iio iip iit in- inb ine ini inn ino inp int io- iob ioe ioi ion ioo iop iot ipb ipe ipi ipn ipo ipp ipt itb ite iti itn ito itp itt n-i nbb nbe nbi nbn nbo nbp nbt ne- neb nee nei nen neo nep net nib nie nii nin nio nip nit nnb nne nni nnn nno nnp nnt no- nob noe noi non noo nop not npb npe npi npn npo npp npt ntb nte nti ntn nto ntp ntt o-i ob- obb obe obi obn obo obp obt oeb oee oei oen oeo oep oet oib oie oii oin oio oip oit on- onb one oni onn ono onp ont oo- oob ooi oon ooo oop oot op- opb ope opi opn opo opp opt ot- otb ote oti otn oto otp ott p-p pbb pbe pbi pbn pbo pbp pbt peb pee pei pen peo pep pet pib pie pii pin pio pip pit pn- pnb pne pni pnn pno pnp pnt pob poe poi pon poo pop pot ppb ppe ppi ppn ppo ppp ppt pt- ptb pte pti ptn pto ptp ptt tbb tbe tbi tbn tbo tbp tbt te- teb tee tei ten teo tep tet tib tie tii tin tio tip tit tnb tne tni tnn tno tnp tnt to- tob toe toi ton too top tot tpb tpe tpi tpn tpo tpp tpt ttb tte tti ttn tto ttp ttt