b-p bbb bbi bbn bbo bbp bbr bbt bi- bib bii bin bio bip bir bit bnb bni bnn bno bnp bnr bnt bob boi bon boo bop bor bot bpb bpi bpn bpo bpp bpr bpt brb bri brn bro brp brr brt btb bti btn bto btp btr btt ibb ibi ibn ibo ibp ibr ibt iib iii iin iio iip iir iit in- inb ini inn ino inp inr int io- iob ioi ion ioo iop ior iot ipb ipi ipn ipo ipp ipr ipt ir- irb iri irn iro irp irr irt itb iti itn ito itp itt n-i nbb nbi nbn nbo nbp nbr nbt nib nii nin nio nip nir nit nnb nni nnn nno nnp nnt no- nob noi non noo nop nor not npb npi npn npo npp npr npt nrb nri nrn nro nrp nrr nrt ntb nti ntn nto ntp ntr ntt o-i ob- obb obi obn obo obp obr obt oib oii oin oio oip oir oit on- onb oni onn ono onp onr ont oo- oob ooi oon ooo oop oor oot op- opb opi opn opo opp opr opt or- orb ori orn oro orp orr ort ot- otb oti otn oto otp otr ott p-p pbb pbi pbn pbo pbp pbr pbt pib pii pin pio pip pir pit pn- pnb pni pnn pno pnp pnr pnt pob poi pon poo pop por pot ppb ppi ppn ppo ppp ppr ppt prb pri prn pro prp prr prt pt- ptb pti ptn pto ptp ptr ptt rbb rbi rbn rbo rbp rbr rbt rib rii rin rio rip rir rit rnb rni rnn rno rnp rnr rnt rob roi ron roo rop ror rot rpb rpi rpn rpo rpp rpr rpt rrb rri rrn rrp rrr rrt rtb rti rtn rto rtp rtr rtt tbb tbi tbn tbo tbp tbr tbt tib tii tin tio tip tir tit tnb tni tnn tno tnp tnr tnt to- tob toi ton too top tor tot tpb tpi tpn tpo tpp tpr tpt trb tri trn tro trp trr trt ttb tti ttn tto ttp ttr ttt