ddd ddi ddn ddo ddp dds di- did dii din dio dip dis dnd dni dnn dno dnp dns dod doi don doo dop dos dpd dpi dpn dpo dpp dps dsd dsi dsn dso dsp dss i-d idd idi idn ido idp ids iid iii iin iio iip iis in- ind ini inn ino inp ins io- iod ioi ion ioo iop ios ipd ipi ipn ipo ipp ips is- isd isi isn iso isp iss n-i ndd ndi ndn ndo ndp nds nid nii nin nio nip nis nni nnn nno nnp nns no- nod noi non noo nop nos npd npi npn npo npp nps nsd nsi nsn nso nsp nss o-i odd odi odn odo odp ods oid oii oin oio oip ois on- ond oni onn ono onp ons oo- ood ooi oon ooo oop oos op- opd opi opn opo opp ops os- osd osi osn oso osp oss p-p pdd pdi pdn pdo pdp pds pid pii pin pio pip pis pn- pnd pni pnn pno pnp pns pod poi pon poo pop pos ppd ppi ppn ppo ppp pps ps- psd psi psn pso psp pss sdd sdi sdn sdo sdp sds sid sii sin sio sip sis snd sni snn sno snp sns sod soi son soo sop sos spd spi spn spo spp sps ss- ssd ssi ssn sso ssp sss