b-p bbb bbi bbn bbp bbr bbt bi- bib bii bin bip bir bit bnb bni bnn bnp bnr bnt bpb bpi bpn bpp bpr bpt brb bri brn brp brr brt btb bti btn btp btr btt ibb ibi ibn ibp ibr ibt iib iii iin iip iir iit in- inb ini inn inp inr int ipb ipi ipn ipp ipr ipt ir- irb iri irn irp irr irt itb iti itn itp itt n-i nbb nbi nbn nbp nbr nbt nib nii nin nip nir nit nnb nni nnn nnp nnt npb npi npn npp npr npt nrb nri nrn nrp nrr nrt ntb nti ntn ntp ntr ntt p-p pbb pbi pbn pbp pbr pbt pib pii pin pip pir pit pn- pnb pni pnn pnp pnr pnt ppb ppi ppn ppp ppr ppt prb pri prn prp prr prt pt- ptb pti ptn ptp ptr ptt rbb rbi rbn rbp rbr rbt rib rii rin rip rir rit rnb rni rnn rnp rnr rnt rpb rpi rpn rpp rpr rpt rrb rri rrn rrp rrr rrt rtb rti rtn rtp rtr rtt tbb tbi tbn tbp tbr tbt tib tii tin tip tir tit tnb tni tnn tnp tnr tnt tpb tpi tpn tpp tpr tpt trb tri trn trp trr trt ttb tti ttn ttp ttr ttt