ddd ddi ddn ddp dds ddt di- did dii din dip dis dit dnd dni dnn dnp dns dnt dpd dpi dpn dpp dps dpt dsd dsi dsn dsp dss dst dtd dti dtn dtp dts dtt i-d idd idi idn idp ids idt iid iii iin iip iis iit in- ind ini inn inp ins int ipd ipi ipn ipp ips ipt is- isd isi isn isp iss ist itd iti itn itp its itt n-i ndd ndi ndn ndp nds ndt nid nii nin nip nis nit nni nnn nnp nns nnt npd npi npn npp nps npt nsd nsi nsn nsp nss nst ntd nti ntn ntp nts ntt p-p pdd pdi pdn pdp pds pdt pid pii pin pip pis pit pn- pnd pni pnn pnp pns pnt ppd ppi ppn ppp pps ppt ps- psd psi psn psp pss pst pt- ptd pti ptn ptp pts ptt sdd sdi sdn sdp sds sdt sid sii sin sip sis sit snd sni snn snp sns snt spd spi spn spp sps spt ss- ssd ssi ssn ssp sss sst std sti stn stp sts stt tdd tdi tdn tdp tds tdt tid tii tin tip tis tit tnd tni tnn tnp tns tnt tpd tpi tpn tpp tps tpt tsd tsi tsn tsp tss tst ttd tti ttn ttp tts ttt