b-p bbb bbi bbl bbp bbr bi- bib bii bil bip bir blb bli bll blp blr bpb bpi bpl bpp bpr brb bri brl brp brr ibb ibi ibl ibp ibr iib iii iil iip iir il- ilb ili ill ilp ilr ipb ipi ipl ipp ipr ir- irb iri irl irp irr l-p lbb lbi lbl lbp lbr lib lii lil lip lir llb lli lll llp llr lpb lpi lpl lpp lpr lrb lri lrp lrr p-p pbb pbi pbl pbp pbr pib pii pil pip pir plb pli pll plp plr ppb ppi ppl ppp ppr prb pri prl prp prr rbb rbi rbl rbp rbr rib rii ril rip rir rli rll rlp rlr rpb rpi rpl rpp rpr rrb rri rrl rrp rrr