b-p bbb bbi bbl bbp bbr bbt bi- bib bii bil bip bir bit biz blb bli bll blp blr blt blz bpb bpi bpl bpp bpr bpt brb bri brl brp brr brt brz btb bti btl btp btr btt btz bzp bzr bzz ibb ibi ibl ibp ibr ibt ibz iib iii iil iip iir iit il- ilb ili ill ilp ilr ilt ilz ipb ipi ipl ipp ipr ipt ir- irb iri irl irp irr irt itb iti itl itp itt itz izi izz l-p lbb lbi lbl lbp lbr lbt lib lii lil lip lir lit liz llb lli lll llp llr llt llz lpb lpi lpl lpp lpr lpt lpz lrb lri lrp lrr lrt lrz ltb lti ltl ltp ltr ltt ltz lzi lzr p-p pbb pbi pbl pbp pbr pbt pbz pib pii pil pip pir pit piz plb pli pll plp plr plt plz ppb ppi ppl ppp ppr ppt ppz prb pri prl prp prr prt prz pt- ptb pti ptl ptp ptr ptt ptz pzl pzp pzt rbb rbi rbl rbp rbr rbt rib rii ril rip rir rit riz rli rll rlp rlr rlt rpb rpi rpl rpp rpr rpt rpz rrb rri rrl rrp rrr rrt rtb rti rtl rtp rtr rtt rtz rzb tbb tbi tbl tbp tbr tbt tbz tib tii til tip tir tit tiz tli tll tlp tlr tlt tlz tpb tpi tpl tpp tpr tpt tpz trb tri trl trp trr trt trz ttb tti ttl ttp ttr ttt zbb zbl zbr zbt zib zil zip zir zit ziz zlr zlt zpi zpl zpp zpr zpt zrl zrp ztl ztr zzr zzt zzz