tsu tsy ttc ttg tti ttl ttn tto ttp tts ttt ttu tty tuc tug tui tul tun tuo tup tus tut tuu tuy tyc tyg tyl tyn tyo typ tys tyt ucc ucg uci ucl ucn uco ucp ucs uct ucu ugc ugg ugi ugl ugn ugo ugp ugs ugt ugu uic uig uii uil uin uio uip uis uit uiu ulc ulg uli ull uln ulo ulp uls ult ulu uly un- unc ung uni unl unn uno unp uns unt unu uny uoc uog uol uon uoo uop uos uot up- upc upg upi upn upo upp ups upt upu usc usg usi usl usn uso usp uss ust usu utc uti utl utn uto utp uts utt utu uty uuc uug uun uus uut uuu uyc uyi uyo uys uyu ycc yci ycl yco ycp ycs ycu ycy ygc ygl ygo yig yii yin yio yip yis yit ylc ylg yli yll yls ylt yly yng ynn ynp yns ynu yny yoc yog yoi yol yon yoo yop yos yot you yoy ypg ypl ypo yps ypu ysc ysg ysi ysl yso ysp yss yst ysu ysy ytc ytl ytn yto ytp yts ytt ytu yug yui yul yun yuo yup yus yut yuu yuy yyc yyg yys yyt yyu yyy