b-p bbb bbf bbi bbl bbp bbt bfb bff bfi bfl bfp bft bi- bib bif bii bil bip bit blb blf bli bll blp blt bpb bpf bpi bpl bpp bpt btb btf bti btl btp btt fbb fbf fbi fbl fbp fbt fff ffi ffl ffp fft fib fif fii fil fip fit flb flf fli fll flp flt fpb fpi fpl fpp fpt ftb ftf fti ftl ftp ftt i-f ibb ibf ibi ibl ibp ibt ifb iff ifi ifl ifp ift iib iif iii iil iip iit il- ilb ilf ili ill ilp ilt ipb ipf ipi ipl ipp ipt itb itf iti itl itp itt l-p lbb lbf lbi lbl lbp lbt lfb lff lfi lfl lfp lft lib lif lii lil lip lit llb llf lli lll llp llt lpb lpf lpi lpl lpp lpt ltb ltf lti ltl ltp ltt p-p pbb pbf pbi pbl pbp pbt pfb pff pfi pfl pfp pft pib pif pii pil pip pit plb plf pli pll plp plt ppb ppf ppi ppl ppp ppt pt- ptb ptf pti ptl ptp ptt tbb tbf tbi tbl tbp tbt tfb tff tfi tfl tfp tft tib tif tii til tip tit tlf tli tll tlp tlt tpb tpf tpi tpl tpp tpt ttb ttf tti ttl ttp ttt