bbb bbd bbi bbm bbs bdb bdd bdi bdm bds bi- bib bid bii bim bis bmb bmd bmi bmm bms bsb bsd bsi bsm bss dbb dbd dbi dbm dbs ddb ddd ddi ddm dds di- dib did dii dim dis dmb dmd dmi dmm dms dsb dsd dsi dsm dss i-d ibb ibd ibi ibm ibs idb idd idi idm ids iib iid iii iim iis im- imb imd imi imm ims is- isb isd isi ism iss mbb mbd mbi mbm mbs mdb mdd mdi mdm mds mi- mib mid mii mim mis mmb mmd mmi mmm mms msb msd msi msm mss sbb sbd sbi sbm sbs sdb sdd sdi sdm sds sib sid sii sim sis smb smd smi smm sms ss- ssb ssd ssi ssm sss