b-p bbb bbe bbi bbn bbo bbp be- beb bee bei ben beo bep bi- bib bie bii bin bio bip bnb bne bni bnn bno bnp bob boe boi bon boo bop bpb bpe bpi bpn bpo bpp ebb ebe ebi ebn ebo ebp eeb eee een eeo eep eib eie eii ein eio eip en- enb ene eni enn eno enp eo- eob eoe eoi eon eoo eop ep- epb epe epi epn epo epp ibb ibe ibi ibn ibo ibp ie- iee iei ien iep iib iie iii iin iio iip in- inb ine ini inn ino inp io- iob ioe ioi ion ioo iop ipb ipe ipi ipn ipo ipp n-i nbb nbe nbi nbn nbo nbp ne- neb nee nei nen neo nep nib nie nii nin nio nip nnb nne nni nnn nno nnp no- nob noe noi non noo nop npb npe npi npn npo npp o-i ob- obb obe obi obn obo obp oeb oee oei oen oeo oep oib oie oii oin oio oip on- onb one oni onn ono onp oo- oob ooi oon ooo oop op- opb ope opi opn opo opp p-p pbb pbe pbi pbn pbo pbp peb pee pei pen peo pep pib pie pii pin pio pip pn- pnb pne pni pnn pno pnp pob poe poi pon poo pop ppb ppe ppi ppn ppo ppp