b-p bbb bbi bbn bbo bbp bbt bi- bib bii bin bio bip bit bnb bni bnn bno bnp bnt bob boi bon boo bop bot bpb bpi bpn bpo bpp bpt btb bti btn bto btp btt ibb ibi ibn ibo ibp ibt iib iii iin iio iip iit in- inb ini inn ino inp int io- iob ioi ion ioo iop iot ipb ipi ipn ipo ipp ipt itb iti itn ito itp itt n-i nbb nbi nbn nbo nbp nbt nib nii nin nio nip nit nnb nni nnn nno nnp nnt no- nob noi non noo nop not npb npi npn npo npp npt ntb nti ntn nto ntp ntt o-i ob- obb obi obn obo obp obt oib oii oin oio oip oit on- onb oni onn ono onp ont oo- oob ooi oon ooo oop oot op- opb opi opn opo opp opt ot- otb oti otn oto otp ott p-p pbb pbi pbn pbo pbp pbt pib pii pin pio pip pit pn- pnb pni pnn pno pnp pnt pob poi pon poo pop pot ppb ppi ppn ppo ppp ppt pt- ptb pti ptn pto ptp ptt tbb tbi tbn tbo tbp tbt tib tii tin tio tip tit tnb tni tnn tno tnp tnt to- tob toi ton too top tot tpb tpi tpn tpo tpp tpt ttb tti ttn tto ttp ttt