ddd ddi ddm ddp dds di- did dii dim dip dis dmd dmi dmm dmp dms dpd dpi dpm dpp dps dsd dsi dsm dsp dss i-d idd idi idm idp ids iid iii iim iip iis im- imd imi imm imp ims ipd ipi ipm ipp ips is- isd isi ism isp iss mdd mdi mdm mdp mds mi- mid mii mim mip mis mmd mmi mmm mmp mms mpd mpi mpm mpp mps msd msi msm msp mss p-p pdd pdi pdm pdp pds pid pii pim pip pis pmd pmi pmm pmp pms ppd ppi ppm ppp pps ps- psd psi psm psp pss sdd sdi sdm sdp sds sid sii sim sip sis smd smi smm smp sms spd spi spm spp sps ss- ssd ssi ssm ssp sss