nkf nki nkk nkn nkr nks nkt nku nlc nle nlf nlg nli nlk nll nln nlr nls nlt nlu nnc nne nnf nng nni nnk nnl nnn nns nnt nnu nrc nre nrf nrg nri nrk nrl nrn nrr nrs nrt nru nsc nse nsf nsg nsi nsk nsl nsn nsr nss nst nsu ntc nte ntf ntg nti ntk ntn ntr nts ntt ntu nuc nue nug nui nuk nul nun nur nus nut nuu rcc rce rcf rcg rci rcl rcn rcr rcs rct rcu re- rec ree ref reg rei rek rel ren rer res ret reu rfc rfe rff rfg rfi rfk rfl rfn rfr rfs rft rfu rgc rge rgf rgg rgi rgk rgn rgr rgs rgt ric rie rif rig rii rik ril rin rir ris rit rkc rke rkf rkg rkk rks rkt rku rlc rle rlf rlg rli rll rln rlr rls rlt rlu rnc rng rni rnn rnr rns rnt rnu rrc rrf rrg rri rrk rrl rrn rrr rrs rrt rru rsc rse rsf rsg rsi rsk rsl rsn rsr rss rst rsu rtc rte rtf rtg rti rtk rtl rtn rtr rts rtt rtu ruc rue ruf rug rui ruk run rur rus rut ruu scc sce scf scg sci sck scl scn scr scs sct scu se- sec see sef seg sei sek sel sen ser ses set seu sfc sfe sff sfg sfi sfk sfl sfn sfr sfs sft sfu sgc sge sgf sgg sgi sgk sgl sgn sgr sgs sgt sgu sic sie sif sig sii sik sil sin sir sis sit siu sk- skc ske skf skg ski skk skl skr sks skt sku slc sle slf slg sli slk sll sln slr sls slt slu snc sne snf sng sni snk snl snn snr sns snt snu sr- src sre srf srg sri srk srl srn srr srs srt ss- ssc sse ssf ssg ssi ssk ssl ssn ssr sss sst ssu stc ste stf stg sti stk stl stn str sts stt stu suc sue suf sug sui suk sul sun sur sus sut suu tcc tce tcf tcg tci tck tcl tcn tcr tcs tct tcu te- tec tee tef teg tei tek tel ten ter tes tet teu tfc tfe tff tfg tfi tfk tfl tfn tfr tfs tft tfu tgc tge tgf tgg tgi tgk tgl tgn tgr tgs tgt tgu tic tie tif tig tii tik til tin tir tis tit tiu tkc tke tkg tkk tkl tkr tks tkt tlc tle tlf tlg tli tlk tll tln tlr tls tlt tlu tnc tne tnf tng tni tnk tnl tnn tnr tns tnt trc tre trf trg tri trk trl trn trr trs trt tru tsc tse tsf tsg tsi tsk tsl tsn tsr tss tst tsu ttc tte ttf ttg tti ttk ttl ttn ttr tts ttt ttu tuc tue tuf tug tui tuk tul tun tur tus tut tuu ucc uce ucf ucg uci uck ucl ucn ucr ucs uct ucu uec uee uef ueg uei uel uen uer ues uet ufc ufe uff ufg ufi ufl ufn ufr ufs uft ufu ugc uge ugf ugg ugi ugk ugl ugn ugr ugs ugt ugu uic uie uif uig uii uil uin uir uis uit uiu ukc uke ukf uki ukk ukl ukn ukr uku ulc ule ulf ulg uli ulk ull uln ulr uls ult ulu un- unc une unf ung uni unk unl unn unr uns unt unu ur- urc ure urf urg uri urk url urn urr urs urt uru usc use usf usg usi usk usl usn usr uss ust usu utc ute utf uti utk utl utn utr uts utt utu uuc uue uug uun uur uus uut uuu