ddd ddi ddr ddt ddy di- did dii dir dit diy drd dri drr drt dry dtd dti dtr dtt dty dy- dyd dyr dyy i-d idd idi idr idt idy iid iii iir iit ir- ird iri irr irt iry itd iti itt ity iyr iyt iyy rdd rdi rdr rdt rdy rid rii rir rit riy rrd rri rrr rrt rtd rti rtr rtt rty ry- ryd ryr ryy tdd tdi tdr tdt tdy tid tii tir tit tiy trd tri trr trt try ttd tti ttr ttt tty tyd tyr tyt ydt ydy yid yii yir yit yrt ytd ytr ytt yyt yyy