tti ttl ttn tto ttp ttt ttu tty tuc tue tug tui tul tun tuo tup tut tuu tuy tyc tye tyg tyl tyn tyo typ tyt ucc uce ucg uci ucl ucn uco ucp uct ucu uec uee ueg uei uel uen uep uet uey ugc uge ugg ugi ugl ugn ugo ugp ugt ugu uic uie uig uii uil uin uio uip uit uiu ulc ule ulg uli ull uln ulo ulp ult ulu uly un- unc une ung uni unl unn uno unp unt unu uny uoc uoe uog uol uon uoo uop uot up- upc upe upg upi upn upo upp upt upu utc ute uti utl utn uto utp utt utu uty uuc uue uug uun uut uuu uyc uyi uyo uyu ycc yce yci ycl yco ycp ycu ycy yec yee yeg yei yel yen yeo yep yet yey ygc ygl ygo yie yig yii yin yio yip yit ylc yle ylg yli yll ylt yly yne yng ynn ynp ynu yny yoc yoe yog yoi yol yon yoo yop yot you yoy ypg ypl ypo ypu ytc yte ytl ytn yto ytp ytt ytu yue yug yui yul yun yuo yup yut yuu yuy yyc yye yyg yyt yyu yyy