ddd ddi ddn ddp ddr dds di- did dii din dip dir dis dnd dni dnn dnp dnr dns dpd dpi dpn dpp dpr dps drd dri drn drp drr drs dsd dsi dsn dsp dsr dss i-d idd idi idn idp idr ids iid iii iin iip iir iis in- ind ini inn inp inr ins ipd ipi ipn ipp ipr ips ir- ird iri irn irp irr irs is- isd isi isn isp isr iss n-i ndd ndi ndn ndp ndr nds nid nii nin nip nir nis nni nnn nnp nns npd npi npn npp npr nps nrd nri nrn nrp nrr nrs nsd nsi nsn nsp nsr nss p-p pdd pdi pdn pdp pdr pds pid pii pin pip pir pis pn- pnd pni pnn pnp pnr pns ppd ppi ppn ppp ppr pps prd pri prn prp prr prs ps- psd psi psn psp psr pss rdd rdi rdn rdp rdr rds rid rii rin rip rir ris rnd rni rnn rnp rnr rns rpd rpi rpn rpp rpr rps rrd rri rrn rrp rrr rrs rsd rsi rsn rsp rsr rss sdd sdi sdn sdp sdr sds sid sii sin sip sir sis snd sni snn snp snr sns spd spi spn spp spr sps sr- srd sri srn srp srr srs ss- ssd ssi ssn ssp ssr sss