-ol bbb bbi bbl bbm bbo bbs bi- bib bii bil bim bio bis blb bli bll blm blo bls bmb bmi bml bmm bmo bms bob boi bol bom boo bos bsb bsi bsl bsm bso bss ibb ibi ibl ibm ibo ibs iib iii iil iim iio iis il- ilb ili ill ilm ilo ils im- imb imi iml imm imo ims io- iob ioi iol iom ioo ios is- isb isi isl ism iso iss lbb lbi lbl lbm lbo lbs lib lii lil lim lio lis llb lli lll llm llo lls lmb lmi lml lmm lmo lms lob loi lol lom loo los lsb lsi lsl lsm lso lss m-o mbb mbi mbl mbm mbo mbs mi- mib mii mil mim mio mis mlb mli mll mlm mlo mls mmb mmi mml mmm mmo mms mob moi mol mom moo mos msb msi msl msm mso mss o-i ob- obb obi obl obm obo obs oib oii oil oim oio ois olb oli oll olm olo ols om- omb omi oml omm omo oms oo- oob ooi ool oom ooo oos os- osb osi osl osm oso oss sbb sbi sbl sbm sbo sbs sib sii sil sim sio sis slb sli sll slm slo sls smb smi sml smm smo sms sob soi sol som soo sos ss- ssb ssi ssl ssm sso sss