c-- ccc ccf ccr cct ccu cfc cff cfr cft cfu crc crf crr crt cru cry ctc ctf ctr ctt ctu cty cuc cuf cur cut cuu cuy cyc cyf cyr cyt fcc fcf fcr fct fcu fcy ffc fff ffr fft ffu ffy frc frf frr frt fru fry ftc ftf ftr ftt ftu fty fuf fur fut fuu fy- fyc rcc rcf rcr rct rcu rfc rff rfr rft rfu rrc rrf rrr rrt rru rtc rtf rtr rtt rtu rty ruc ruf rur rut ruu ruy ry- ryc ryf ryr ryu ryy tcc tcf tcr tct tcu tfc tff tfr tft tfu trc trf trr trt tru try ttc ttf ttr ttt ttu tty tuc tuf tur tut tuu tuy tyc tyf tyr tyt ucc ucf ucr uct ucu ufc uff ufr uft ufu ur- urc urf urr urt uru ury utc utf utr utt utu uty uuc uur uut uuu uyc uyu ycc ycf ycu ycy yfc yff yfr yft yfu yrc yrf yrt yru ytc ytf ytr ytt ytu yur yut yuu yuy yyc yyf yyt yyu yyy