tru try ttb ttc tte tti ttl tto ttp ttr ttt ttu tty tub tuc tue tui tul tuo tup tur tut tuu tuy tyc tye tyl tyo typ tyr tyt ubb ubc ube ubi ubl ubo ubp ubr ubt ubu uby ucb ucc uce uci ucl uco ucp ucr uct ucu ueb uec uee uei uel uep uer uet uey uib uic uie uii uil uio uip uir uit uiu ulb ulc ule uli ull ulo ulp ulr ult ulu uly uob uoc uoe uol uoo uop uor uot up- upb upc upe upi upo upp upr upt upu ur- urb urc ure uri url uro urp urr urt uru ury utb utc ute uti utl uto utp utr utt utu uty uuc uue uur uut uuu uyc uyi uyo uyu ybc ybe ybi ybl ybp ybr yby ycc yce yci ycl yco ycp ycu ycy yeb yec yee yei yel yeo yep yer yet yey yie yii yio yip yir yit ylc yle yli yll ylr ylt yly yob yoc yoe yoi yol yoo yop yor yot you yoy ypl ypo ypu yrc yre yro yrp yrt yru ytc yte ytl yto ytp ytr ytt ytu yue yui yul yuo yup yur yut yuu yuy yyb yyc yye yyt yyu yyy