tte ttf ttm ttn tto ttp ttr ttt ttu tty tuc tue tuf tum tun tuo tup tur tut tuu tuy tyc tye tyf tym tyn tyo typ tyr tyt ucc uce ucf ucm ucn uco ucp ucr uct ucu uec uee uef uem uen uep uer uet uey ufc ufe uff ufm ufn ufo ufp ufr uft ufu um- umc ume umf umm umn umo ump umr umt umu un- unc une unf unm unn uno unp unr unt unu uny uoc uoe uom uon uoo uop uor uot up- upc upe upf upm upn upo upp upr upt upu ur- urc ure urf urm urn uro urp urr urt uru ury utc ute utf utm utn uto utp utr utt utu uty uuc uue uum uun uur uut uuu uyc uyo uyu ycc yce ycf yco ycp ycu ycy yec yee yef yem yen yeo yep yer yet yey yfc yfe yff yfm yfr yft yfu ymc yme ymm ymo ymt yne ynn ynp ynu yny yoc yoe yof yom yon yoo yop yor yot you yoy ypf ypo ypu yrc yre yrf yrn yro yrp yrt yru ytc yte ytf ytm ytn yto ytp ytr ytt ytu yue yum yun yuo yup yur yut yuu yuy yyc yye yyf yyt yyu yyy