ddd ddi ddm dds ddt di- did dii dim dis dit dmd dmi dmm dms dmt dsd dsi dsm dss dst dtd dti dtm dts dtt i-d idd idi idm ids idt iid iii iim iis iit im- imd imi imm ims imt is- isd isi ism iss ist itd iti itm its itt mdd mdi mdm mds mdt mi- mid mii mim mis mit mmd mmi mmm mms mmt msd msi msm mss mst mtd mti mtm mts mtt sdd sdi sdm sds sdt sid sii sim sis sit smd smi smm sms smt ss- ssd ssi ssm sss sst std sti stm sts stt tdd tdi tdm tds tdt tid tii tim tis tit tmd tmi tmm tms tmt tsd tsi tsm tss tst ttd tti ttm tts ttt