rpn rpo rpp rpr rpt rrb rrc rrf rri rrl rrn rrp rrr rrt rtb rtc rtf rti rtl rtn rto rtp rtr rtt rty ry- ryc ryf ryn ryo ryr ryy tbb tbc tbf tbi tbl tbn tbo tbp tbr tbt tcb tcc tcf tci tcl tcn tco tcp tcr tct tfb tfc tff tfi tfl tfn tfo tfp tfr tft tib tic tif tii til tin tio tip tir tit tiy tlc tlf tli tll tln tlo tlp tlr tlt tnb tnc tnf tni tnl tnn tno tnp tnr tnt to- tob toc tof toi tol ton too top tor tot toy tpb tpc tpf tpi tpl tpn tpo tpp tpr tpt trb trc trf tri trl trn tro trp trr trt try ttb ttc ttf tti ttl ttn tto ttp ttr ttt tty tyc tyf tyl tyn tyo typ tyr tyt ybc ybf ybi ybl ybp ybr yby ycc ycf yci ycl yco ycp ycy yfc yff yfr yft yif yii yin yio yip yir yit ylc yli yll ylr ylt yly ynn ynp yny yob yoc yof yoi yol yon yoo yop yor yot yoy ypf ypl ypo yrc yrf yrn yro yrp yrt ytc ytf ytl ytn yto ytp ytr ytt yyb yyc yyf yyt yyy