ron roo rop ror ros rot rou rpc rpd rpe rpg rpi rpk rpl rpn rpo rpp rpr rps rpt rpu rrc rrd rrg rri rrk rrl rrn rrp rrr rrs rrt rru rsc rsd rse rsg rsi rsk rsl rsn rso rsp rsr rss rst rsu rtc rtd rte rtg rti rtk rtl rtn rto rtp rtr rts rtt rtu ruc rud rue rug rui ruk run ruo rup rur rus rut ruu scc scd sce scg sci sck scl scn sco scp scr scs sct scu sdc sdd sde sdg sdi sdk sdl sdn sdo sdp sdr sds sdt sdu se- sec sed see seg sei sek sel sen seo sep ser ses set seu sgc sgd sge sgg sgi sgk sgl sgn sgo sgp sgr sgs sgt sgu sic sid sie sig sii sik sil sin sio sip sir sis sit siu sk- skc skd ske skg ski skk skl sko skp skr sks skt sku slc sld sle slg sli slk sll sln slo slp slr sls slt slu snc snd sne sng sni snk snl snn sno snp snr sns snt snu soc sod soe sog soi sok sol son soo sop sor sos sot sou spc spd spe spg spi spk spl spn spo spp spr sps spt spu sr- src srd sre srg sri srk srl srn sro srp srr srs srt ss- ssc ssd sse ssg ssi ssk ssl ssn sso ssp ssr sss sst ssu stc std ste stg sti stk stl stn sto stp str sts stt stu suc sud sue sug sui suk sul sun suo sup sur sus sut suu tcc tcd tce tcg tci tck tcl tcn tco tcp tcr tcs tct tcu tdc tdd tde tdg tdi tdk tdl tdn tdo tdp tdr tds tdt tdu te- tec ted tee teg tei tek tel ten teo tep ter tes tet teu tgc tge tgg tgi tgk tgl tgn tgo tgp tgr tgs tgt tgu tic tid tie tig tii tik til tin tio tip tir tis tit tiu tkc tke tkg tkk tkl tko tkp tkr tks tkt tlc tld tle tlg tli tlk tll tln tlo tlp tlr tls tlt tlu tnc tnd tne tng tni tnk tnl tnn tno tnp tnr tns tnt to- toc tod toe tog toi tok tol ton too top tor tos tot tou tpc tpd tpe tpg tpi tpk tpl tpn tpo tpp tpr tps tpt tpu trc trd tre trg tri trk trl trn tro trp trr trs trt tru tsc tsd tse tsg tsi tsk tsl tsn tso tsp tsr tss tst tsu ttc ttd tte ttg tti ttk ttl ttn tto ttp ttr tts ttt ttu tuc tud tue tug tui tuk tul tun tuo tup tur tus tut tuu ucc ucd uce ucg uci uck ucl ucn uco ucp ucr ucs uct ucu udc udd ude udg udi udk udl udn udo udp udr uds udt udu uec ued uee ueg uei uel uen uep uer ues uet ugc uge ugg ugi ugk ugl ugn ugo ugp ugr ugs ugt ugu uic uid uie uig uii uil uin uio uip uir uis uit uiu ukc uke uki ukk ukl ukn ukp ukr uku ulc uld ule ulg uli ulk ull uln ulo ulp ulr uls ult ulu un- unc und une ung uni unk unl unn uno unp unr uns unt unu uoc uod uoe uog uok uol uon uoo uop uor uos uot up- upc upd upe upg upi upk upn upo upp upr ups upt upu ur- urc urd ure urg uri urk url urn uro urp urr urs urt uru usc usd use usg usi usk usl usn uso usp usr uss ust usu utc utd ute uti utk utl utn uto utp utr uts utt utu uuc uue uug uun uur uus uut uuu