-ol bbb bbi bbl bbm bbo bbs bbt bi- bib bii bil bim bio bis bit blb bli bll blm blo bls blt bmb bmi bml bmm bmo bms bmt bob boi bol bom boo bos bot bsb bsi bsl bsm bso bss bst btb bti btl btm bto bts btt ibb ibi ibl ibm ibo ibs ibt iib iii iil iim iio iis iit il- ilb ili ill ilm ilo ils ilt im- imb imi iml imm imo ims imt io- iob ioi iol iom ioo ios iot is- isb isi isl ism iso iss ist itb iti itl itm ito its itt lbb lbi lbl lbm lbo lbs lbt lib lii lil lim lio lis lit llb lli lll llm llo lls llt lmb lmi lml lmm lmo lms lmt lob loi lol lom loo los lot lsb lsi lsl lsm lso lss lst ltb lti ltl ltm lto lts ltt m-o mbb mbi mbl mbm mbo mbs mbt mi- mib mii mil mim mio mis mit mlb mli mll mlm mlo mls mlt mmb mmi mml mmm mmo mms mmt mob moi mol mom moo mos mot msb msi msl msm mso mss mst mtb mti mtl mtm mto mts mtt o-i ob- obb obi obl obm obo obs obt oib oii oil oim oio ois oit olb oli oll olm olo ols olt om- omb omi oml omm omo oms omt oo- oob ooi ool oom ooo oos oot os- osb osi osl osm oso oss ost ot- otb oti otl otm oto ots ott sbb sbi sbl sbm sbo sbs sbt sib sii sil sim sio sis sit slb sli sll slm slo sls slt smb smi sml smm smo sms smt sob soi sol som soo sos sot ss- ssb ssi ssl ssm sso sss sst stb sti stl stm sto sts stt tbb tbi tbl tbm tbo tbs tbt tib tii til tim tio tis tit tli tll tlm tlo tls tlt tmb tmi tml tmm tmo tms tmt to- tob toi tol tom too tos tot tsb tsi tsl tsm tso tss tst ttb tti ttl ttm tto tts ttt