-up ddd ddn ddo ddp dds ddt ddu dnd dnn dno dnp dns dnt dod don doo dop dos dot dou dpd dpn dpo dpp dps dpt dpu dsd dsn dso dsp dss dst dsu dtd dtn dto dtp dts dtt dtu dud dun duo dup dus dut ndd ndn ndo ndp nds ndt ndu nnn nno nnp nns nnt nnu no- nod non noo nop nos not nou npd npn npo npp nps npt npu nsd nsn nso nsp nss nst nsu ntd ntn nto ntp nts ntt ntu nud nun nuo nup nus nut nuu odd odn odo odp ods odt odu on- ond onn ono onp ons ont onu oo- ood oon ooo oop oos oot op- opd opn opo opp ops opt os- osd osn oso osp oss ost osu ot- otd otn oto otp ots ott otu ou- oud oun ouo oup ous out p-p pdd pdn pdo pdp pds pdt pdu pn- pnd pnn pno pnp pns pnt pnu pod pon poo pop pos pot pou ppd ppn ppo ppp pps ppt ppu ps- psd psn pso psp pss pst psu pt- ptd ptn pto ptp pts ptt ptu pud pun pup pus put puu sdd sdn sdo sdp sds sdt sdu snd snn sno snp sns snt snu sod son soo sop sos sot sou spd spn spo spp sps spt spu ss- ssd ssn sso ssp sss sst ssu std stn sto stp sts stt stu sud sun suo sup sus sut suu tdd tdn tdo tdp tds tdt tdu tnd tnn tno tnp tns tnt to- tod ton too top tos tot tou tpd tpn tpo tpp tps tpt tpu tsd tsn tso tsp tss tst tsu ttd ttn tto ttp tts ttt ttu tud tun tuo tup tus tut tuu udd udn udo udp uds udt udu un- und unn uno unp uns unt unu uod uon uoo uop uos uot up- upd upn upo upp ups upt upu usd usn uso usp uss ust usu utd utn uto utp uts utt utu uun uus uut uuu