bbb bbf bbi bbl bbm bbr bbs bbt bfb bff bfi bfl bfm bfr bfs bft bi- bib bif bii bil bim bir bis bit blb blf bli bll blm blr bls blt bmb bmf bmi bml bmm bmr bms bmt brb brf bri brl brm brr brs brt bsb bsf bsi bsl bsm bsr bss bst btb btf bti btl btm btr bts btt fbb fbf fbi fbl fbm fbr fbs fbt fff ffi ffl ffm ffr ffs fft fib fif fii fil fim fir fis fit flb flf fli fll flm flr fls flt fmb fmf fmi fml fmm fmr fms fmt frb frf fri frl frm frr frs frt fsb fsf fsi fsl fsm fsr fss fst ftb ftf fti ftl ftm ftr fts ftt i-f ibb ibf ibi ibl ibm ibr ibs ibt ifb iff ifi ifl ifm ifr ifs ift iib iif iii iil iim iir iis iit il- ilb ilf ili ill ilm ilr ils ilt im- imb imf imi iml imm ims imt ir- irb irf iri irl irm irr irs irt is- isb isf isi isl ism isr iss ist itb itf iti itl itm its itt lbb lbf lbi lbl lbm lbr lbs lbt lfb lff lfi lfl lfm lfr lfs lft lib lif lii lil lim lir lis lit llb llf lli lll llm llr lls llt lmb lmf lmi lml lmm lmr lms lmt lrb lrf lri lrm lrr lrs lrt lsb lsf lsi lsl lsm lsr lss lst ltb ltf lti ltl ltm ltr lts ltt m-f m-r mbb mbf mbi mbl mbm mbr mbs mbt mfb mff mfi mfl mfm mfr mfs mft mi- mib mif mii mil mim mir mis mit mlb mlf mli mll mlm mlr mls mlt mmb mmf mmi mml mmm mmr mms mmt mrb mrf mri mrl mrm mrr mrs mrt msb msf msi msl msm msr mss mst mtb mtf mti mtl mtm mtr mts mtt rbb rbf rbi rbl rbm rbr rbs rbt rfb rff rfi rfl rfm rfr rfs rft rib rif rii ril rim rir ris rit rlf rli rll rlm rlr rls rlt rmb rmf rmi rml rmm rmr rms rmt rrb rrf rri rrl rrm rrr rrs rrt rsb rsf rsi rsl rsm rsr rss rst rtb rtf rti rtl rtm rtr rts rtt sbb sbf sbi sbl sbm sbr sbs sbt sfb sff sfi sfl sfm sfr sfs sft sib sif sii sil sim sir sis sit slb slf sli sll slm slr sls slt smb smf smi sml smm smr sms smt sr- srb srf sri srl srm srr srs srt ss- ssb ssf ssi ssl ssm ssr sss sst stb stf sti stl stm str sts stt tbb tbf tbi tbl tbm tbr tbs tbt tfb tff tfi tfl tfm tfr tfs tft tib tif tii til tim tir tis tit tlf tli tll tlm tlr tls tlt tmb tmf tmi tml tmm tmr tms tmt trb trf tri trl trm trr trs trt tsb tsf tsi tsl tsm tsr tss tst ttb ttf tti ttl ttm ttr tts ttt