-up b-p b-u bbb bbi bbn bbp bbr bbu bi- bib bii bin bip bir biu bnb bni bnn bnp bnr bnu bpb bpi bpn bpp bpr bpu brb bri brn brp brr bru bub bui bun bup bur buu ibb ibi ibn ibp ibr ibu iib iii iin iip iir iiu in- inb ini inn inp inr inu ipb ipi ipn ipp ipr ipu ir- irb iri irn irp irr iru iu- iub iui iup iur n-i nbb nbi nbn nbp nbr nbu nib nii nin nip nir niu nnb nni nnn nnp nnu npb npi npn npp npr npu nrb nri nrn nrp nrr nru nub nui nun nup nur nuu p-p pbb pbi pbn pbp pbr pbu pib pii pin pip pir piu pn- pnb pni pnn pnp pnr pnu ppb ppi ppn ppp ppr ppu prb pri prn prp prr pru pub pui pun pup pur puu rbb rbi rbn rbp rbr rbu rib rii rin rip rir rnb rni rnn rnp rnr rnu rpb rpi rpn rpp rpr rpu rrb rri rrn rrp rrr rru rub rui run rup rur ruu ubb ubi ubn ubp ubr ubu uib uii uin uip uir uiu un- unb uni unn unp unr unu up- upb upi upn upp upr upu ur- urb uri urn urp urr uru uun uur uuu