-ol bbb bbf bbi bbl bbm bbo bbr bbs bbt bfb bff bfi bfl bfm bfo bfr bfs bft bi- bib bif bii bil bim bio bir bis bit blb blf bli bll blm blo blr bls blt bmb bmf bmi bml bmm bmo bmr bms bmt bob bof boi bol bom boo bor bos bot brb brf bri brl brm bro brr brs brt bsb bsf bsi bsl bsm bso bsr bss bst btb btf bti btl btm bto btr bts btt fbb fbf fbi fbl fbm fbo fbr fbs fbt fff ffi ffl ffm ffo ffr ffs fft fib fif fii fil fim fir fis fit flb flf fli fll flm flo flr fls flt fmb fmf fmi fml fmm fmo fmr fms fmt fob fof foi fol fom foo for fos fot frb frf fri frl frm fro frr frs frt fsb fsf fsi fsl fsm fso fsr fss fst ftb ftf fti ftl ftm fto ftr fts ftt i-f ibb ibf ibi ibl ibm ibo ibr ibs ibt ifb iff ifi ifl ifm ifo ifr ifs ift iib iif iii iil iim iio iir iis iit il- ilb ilf ili ill ilm ilo ilr ils ilt im- imb imf imi iml imm imo ims imt io- iob iof ioi iol iom ioo ior ios iot ir- irb irf iri irl irm iro irr irs irt is- isb isf isi isl ism iso isr iss ist itb itf iti itl itm ito its itt lbb lbf lbi lbl lbm lbo lbr lbs lbt lfb lff lfi lfl lfm lfo lfr lfs lft lib lif lii lil lim lio lir lis lit llb llf lli lll llm llo llr lls llt lmb lmf lmi lml lmm lmo lmr lms lmt lob lof loi lol lom loo lor los lot lrb lrf lri lrm lro lrr lrs lrt lsb lsf lsi lsl lsm lso lsr lss lst ltb ltf lti ltl ltm lto ltr lts ltt m-f m-o m-r mbb mbf mbi mbl mbm mbo mbr mbs mbt mfb mff mfi mfl mfm mfo mfr mfs mft mi- mib mif mii mil mim mio mir mis mit mlb mlf mli mll mlm mlo mlr mls mlt mmb mmf mmi mml mmm mmo mmr mms mmt mob mof moi mol mom moo mor mos mot mrb mrf mri mrl mrm mro mrr mrs mrt msb msf msi msl msm mso msr mss mst mtb mtf mti mtl mtm mto mtr mts mtt o-i ob- obb obf obi obl obm obo obr obs obt of- ofb off ofi ofl ofm ofo ofr ofs oft oib oif oii oil oim oio oir ois oit olb olf oli oll olm olo ols olt om- omb omf omi oml omm omo omr oms omt oo- oob oof ooi ool oom ooo oor oos oot or- orb orf ori orl orm oro orr ors ort os- osb osf osi osl osm oso osr oss ost ot- otb otf oti otl otm oto otr ots ott rbb rbf rbi rbl rbm rbo rbr rbs rbt rfb rff rfi rfl rfm rfo rfr rfs rft rib rif rii ril rim rio rir ris rit rlf rli rll rlm rlo rlr rls rlt rmb rmf rmi rml rmm rmo rmr rms rmt rob rof roi rol rom roo ror ros rot rrb rrf rri rrl rrm rrr rrs rrt rsb rsf rsi rsl rsm rso rsr rss rst rtb rtf rti rtl rtm rto rtr rts rtt sbb sbf sbi sbl sbm sbo sbr sbs sbt sfb sff sfi sfl sfm sfo sfr sfs sft sib sif sii sil sim sio sir sis sit slb slf sli sll slm slo slr sls slt smb smf smi sml smm smo smr sms smt sob sof soi sol som soo sor sos sot sr- srb srf sri srl srm sro srr srs srt ss- ssb ssf ssi ssl ssm sso ssr sss sst stb stf sti stl stm sto str sts stt tbb tbf tbi tbl tbm tbo tbr tbs tbt tfb tff tfi tfl tfm tfo tfr tfs tft tib tif tii til tim tio tir tis tit tlf tli tll tlm tlo tlr tls tlt tmb tmf tmi tml tmm tmo tmr tms tmt to- tob tof toi tol tom too tor tos tot trb trf tri trl trm tro trr trs trt tsb tsf tsi tsl tsm tso tsr tss tst ttb ttf tti ttl ttm tto ttr tts ttt