ddd ddo ddr ddt ddu ddy dod doo dor dot dou doy drd dro drr drt dru dry dtd dto dtr dtt dtu dty dud duo dur dut duy dy- dyd dyo dyr dyu dyy odd odo odr odt odu oo- ood ooo oor oot or- ord oro orr ort oru ory ot- otd oto otr ott otu ou- oud ouo our out oyd oyo rdd rdo rdr rdt rdu rdy rod roo ror rot rou roy rrd rrr rrt rru rtd rto rtr rtt rtu rty rud ruo rur rut ruu ruy ry- ryd ryo ryr ryu ryy tdd tdo tdr tdt tdu tdy to- tod too tor tot tou toy trd tro trr trt tru try ttd tto ttr ttt ttu tty tud tuo tur tut tuu tuy tyd tyo tyr tyt udd udo udr udt udu uod uoo uor uot ur- urd uro urr urt uru ury utd uto utr utt utu uty uur uut uuu uyo uyu ydo ydt ydy yod yoo yor yot you yoy yro yrt yru ytd yto ytr ytt ytu yud yuo yur yut yuu yuy yyt yyu yyy