bbb bbf bbi bbl bbm bbs bfb bff bfi bfl bfm bfs bi- bib bif bii bil bim bis blb blf bli bll blm bls bmb bmf bmi bml bmm bms bsb bsf bsi bsl bsm bss fbb fbf fbi fbl fbm fbs fff ffi ffl ffm ffs fib fif fii fil fim fis flb flf fli fll flm fls fmb fmf fmi fml fmm fms fsb fsf fsi fsl fsm fss i-f ibb ibf ibi ibl ibm ibs ifb iff ifi ifl ifm ifs iib iif iii iil iim iis il- ilb ilf ili ill ilm ils im- imb imf imi iml imm ims is- isb isf isi isl ism iss lbb lbf lbi lbl lbm lbs lfb lff lfi lfl lfm lfs lib lif lii lil lim lis llb llf lli lll llm lls lmb lmf lmi lml lmm lms lsb lsf lsi lsl lsm lss m-f mbb mbf mbi mbl mbm mbs mfb mff mfi mfl mfm mfs mi- mib mif mii mil mim mis mlb mlf mli mll mlm mls mmb mmf mmi mml mmm mms msb msf msi msl msm mss sbb sbf sbi sbl sbm sbs sfb sff sfi sfl sfm sfs sib sif sii sil sim sis slb slf sli sll slm sls smb smf smi sml smm sms ss- ssb ssf ssi ssl ssm sss