ddd ddi ddn ddo ddp dds ddt di- did dii din dio dip dis dit dnd dni dnn dno dnp dns dnt dod doi don doo dop dos dot dpd dpi dpn dpo dpp dps dpt dsd dsi dsn dso dsp dss dst dtd dti dtn dto dtp dts dtt i-d idd idi idn ido idp ids idt iid iii iin iio iip iis iit in- ind ini inn ino inp ins int io- iod ioi ion ioo iop ios iot ipd ipi ipn ipo ipp ips ipt is- isd isi isn iso isp iss ist itd iti itn ito itp its itt n-i ndd ndi ndn ndo ndp nds ndt nid nii nin nio nip nis nit nni nnn nno nnp nns nnt no- nod noi non noo nop nos not npd npi npn npo npp nps npt nsd nsi nsn nso nsp nss nst ntd nti ntn nto ntp nts ntt o-i odd odi odn odo odp ods odt oid oii oin oio oip ois oit on- ond oni onn ono onp ons ont oo- ood ooi oon ooo oop oos oot op- opd opi opn opo opp ops opt os- osd osi osn oso osp oss ost ot- otd oti otn oto otp ots ott p-p pdd pdi pdn pdo pdp pds pdt pid pii pin pio pip pis pit pn- pnd pni pnn pno pnp pns pnt pod poi pon poo pop pos pot ppd ppi ppn ppo ppp pps ppt ps- psd psi psn pso psp pss pst pt- ptd pti ptn pto ptp pts ptt sdd sdi sdn sdo sdp sds sdt sid sii sin sio sip sis sit snd sni snn sno snp sns snt sod soi son soo sop sos sot spd spi spn spo spp sps spt ss- ssd ssi ssn sso ssp sss sst std sti stn sto stp sts stt tdd tdi tdn tdo tdp tds tdt tid tii tin tio tip tis tit tnd tni tnn tno tnp tns tnt to- tod toi ton too top tos tot tpd tpi tpn tpo tpp tps tpt tsd tsi tsn tso tsp tss tst ttd tti ttn tto ttp tts ttt