rtk rtn rto rtr rtt rtu ruc rue rug ruh rui ruk run ruo rur rut ruu tcc tce tcg tch tci tck tcn tco tcr tct tcu te- tec tee teg teh tei tek ten teo ter tet teu tgc tge tgg tgh tgi tgk tgn tgo tgr tgt tgu th- thc the thg thh thi thk thn tho thr tht thu tic tie tig tih tii tik tin tio tir tit tiu tkc tke tkg tkk tko tkr tkt tnc tne tng tnh tni tnk tnn tno tnr tnt to- toc toe tog toh toi tok ton too tor tot tou trc tre trg trh tri trk trn tro trr trt tru ttc tte ttg tth tti ttk ttn tto ttr ttt ttu tuc tue tug tuh tui tuk tun tuo tur tut tuu ucc uce ucg uch uci uck ucn uco ucr uct ucu uec uee ueg ueh uei uen uer uet ugc uge ugg ugh ugi ugk ugn ugo ugr ugt ugu uhc uhe uhh uhi uho uhr uht uhu uic uie uig uii uin uio uir uit uiu ukc uke uki ukk ukn ukr uku un- unc une ung unh uni unk unn uno unr unt unu uoc uoe uog uok uon uoo uor uot ur- urc ure urg uri urk urn uro urr urt uru utc ute uth uti utk utn uto utr utt utu uuc uue uug uun uur uut uuu