pcu pdc pdd pde pdi pdk pdn pdo pdp pdr pds pdt pdu pec ped pee pei pek pen peo pep per pes pet peu pic pid pie pii pik pin pio pip pir pis pit piu pkc pkd pke pki pkn pko pkp pkr pks pkt pku pn- pnc pnd pne pni pnk pnn pno pnp pnr pns pnt pnu poc pod poe poi pok pon poo pop por pos pot pou ppc ppd ppe ppi ppk ppn ppo ppp ppr pps ppt ppu prc prd pre pri prk prn pro prp prr prs prt pru ps- psc psd pse psi psk psn pso psp psr pss pst psu pt- ptc ptd pte pti ptk ptn pto ptp ptr pts ptt ptu puc pud pue pui puk pun pup pur pus put puu rcc rcd rce rci rcn rco rcp rcr rcs rct rcu rdc rdd rde rdi rdn rdo rdp rdr rds rdt rdu re- rec red ree rei rek ren reo rep rer res ret reu ric rid rie rii rik rin rio rip rir ris rit rkc rke rkk rko rkp rks rkt rku rnc rnd rni rnn rno rnp rnr rns rnt rnu roc rod roe roi rok ron roo rop ror ros rot rou rpc rpd rpe rpi rpk rpn rpo rpp rpr rps rpt rpu rrc rrd rri rrk rrn rrp rrr rrs rrt rru rsc rsd rse rsi rsk rsn rso rsp rsr rss rst rsu rtc rtd rte rti rtk rtn rto rtp rtr rts rtt rtu ruc rud rue rui ruk run ruo rup rur rus rut ruu scc scd sce sci sck scn sco scp scr scs sct scu sdc sdd sde sdi sdk sdn sdo sdp sdr sds sdt sdu se- sec sed see sei sek sen seo sep ser ses set seu sic sid sie sii sik sin sio sip sir sis sit siu sk- skc skd ske ski skk sko skp skr sks skt sku snc snd sne sni snk snn sno snp snr sns snt snu soc sod soe soi sok son soo sop sor sos sot sou spc spd spe spi spk spn spo spp spr sps spt spu sr- src srd sre sri srk srn sro srp srr srs srt ss- ssc ssd sse ssi ssk ssn sso ssp ssr sss sst ssu stc std ste sti stk stn sto stp str sts stt stu suc sud sue sui suk sun suo sup sur sus sut suu tcc tcd tce tci tck tcn tco tcp tcr tcs tct tcu tdc tdd tde tdi tdk tdn tdo tdp tdr tds tdt tdu te- tec ted tee tei tek ten teo tep ter tes tet teu tic tid tie tii tik tin tio tip tir tis tit tiu tkc tke tkk tko tkp tkr tks tkt tnc tnd tne tni tnk tnn tno tnp tnr tns tnt to- toc tod toe toi tok ton too top tor tos tot tou tpc tpd tpe tpi tpk tpn tpo tpp tpr tps tpt tpu trc trd tre tri trk trn tro trp trr trs trt tru tsc tsd tse tsi tsk tsn tso tsp tsr tss tst tsu ttc ttd tte tti ttk ttn tto ttp ttr tts ttt ttu tuc tud tue tui tuk tun tuo tup tur tus tut tuu ucc ucd uce uci uck ucn uco ucp ucr ucs uct ucu udc udd ude udi udk udn udo udp udr uds udt udu uec ued uee uei uen uep uer ues uet uic uid uie uii uin uio uip uir uis uit uiu ukc uke uki ukk ukn ukp ukr uku un- unc und une uni unk unn uno unp unr uns unt unu uoc uod uoe uok uon uoo uop uor uos uot up- upc upd upe upi upk upn upo upp upr ups upt upu ur- urc urd ure uri urk urn uro urp urr urs urt uru usc usd use usi usk usn uso usp usr uss ust usu utc utd ute uti utk utn uto utp utr uts utt utu uuc uue uun uur uus uut uuu