ddd ddi ddm ddo ddp dds di- did dii dim dio dip dis dmd dmi dmm dmo dmp dms dod doi dom doo dop dos dpd dpi dpm dpo dpp dps dsd dsi dsm dso dsp dss i-d idd idi idm ido idp ids iid iii iim iio iip iis im- imd imi imm imo imp ims io- iod ioi iom ioo iop ios ipd ipi ipm ipo ipp ips is- isd isi ism iso isp iss m-o mdd mdi mdm mdo mdp mds mi- mid mii mim mio mip mis mmd mmi mmm mmo mmp mms mod moi mom moo mop mos mpd mpi mpm mpo mpp mps msd msi msm mso msp mss o-i odd odi odm odo odp ods oid oii oim oio oip ois om- omd omi omm omo omp oms oo- ood ooi oom ooo oop oos op- opd opi opm opo opp ops os- osd osi osm oso osp oss p-p pdd pdi pdm pdo pdp pds pid pii pim pio pip pis pmd pmi pmm pmo pmp pms pod poi pom poo pop pos ppd ppi ppm ppo ppp pps ps- psd psi psm pso psp pss sdd sdi sdm sdo sdp sds sid sii sim sio sip sis smd smi smm smo smp sms sod soi som soo sop sos spd spi spm spo spp sps ss- ssd ssi ssm sso ssp sss