srk srl sro srr srs srt ss- ssc sse ssg ssi ssk ssl sso ssr sss sst ssu stc ste stg sti stk stl sto str sts stt stu suc sue sug sui suk sul suo sur sus sut suu tcc tce tcg tci tck tcl tco tcr tcs tct tcu te- tec tee teg tei tek tel teo ter tes tet teu tgc tge tgg tgi tgk tgl tgo tgr tgs tgt tgu tic tie tig tii tik til tio tir tis tit tiu tkc tke tkg tkk tkl tko tkr tks tkt tlc tle tlg tli tlk tll tlo tlr tls tlt tlu to- toc toe tog toi tok tol too tor tos tot tou trc tre trg tri trk trl tro trr trs trt tru tsc tse tsg tsi tsk tsl tso tsr tss tst tsu ttc tte ttg tti ttk ttl tto ttr tts ttt ttu tuc tue tug tui tuk tul tuo tur tus tut tuu ucc uce ucg uci uck ucl uco ucr ucs uct ucu uec uee ueg uei uel uer ues uet ugc uge ugg ugi ugk ugl ugo ugr ugs ugt ugu uic uie uig uii uil uio uir uis uit uiu ukc uke uki ukk ukl ukr uku ulc ule ulg uli ulk ull ulo ulr uls ult ulu uoc uoe uog uok uol uoo uor uos uot ur- urc ure urg uri urk url uro urr urs urt uru usc use usg usi usk usl uso usr uss ust usu utc ute uti utk utl uto utr uts utt utu uuc uue uug uur uus uut uuu