-er -ey ddd dde ddi ddr ddt ddx ddy de- ded dee dei der det dex dey di- did die dii dir dit dix diy drd dre dri drr drt drx dry dtd dte dti dtr dtt dtx dty dxd dxi dxr dxt dxx dy- dyd dye dyr dyy ed- edd ede edi edr edt edx edy eed eee eer eet eex eey eid eie eii eir eit eix erd ere eri err ert ery etd ete eti etr ett etx ety ex- exd exe exi exr ext exx exy eyd eye eyr eyt i-d idd ide idi idr idt idx idy ie- ied iee iei ier iet iex iey iid iie iii iir iit iix ir- ird ire iri irr irt irx iry itd ite iti itt itx ity ixe ixi ixy iye iyr iyt iyy rdd rde rdi rdr rdt rdx rdy re- red ree rei rer ret rex rey rid rie rii rir rit rix riy rrd rri rrr rrt rtd rte rti rtr rtt rtx rty rxr ry- ryd rye ryr ryy t-x tdd tde tdi tdr tdt tdx tdy te- ted tee tei ter tet tex tey tid tie tii tir tit tix tiy trd tre tri trr trt trx try ttd tte tti ttr ttt ttx tty txe txi txt tyd tye tyr tyt xde xdi xdr xdt xed xee xer xet xex xie xii xit xix xrd xrt xrx xry xti xtr xtx xty xxi xxx xxy xyr xyy yde ydt ydy yed yee yei yer yet yex yey yid yie yii yir yit yre yrt ytd yte ytr ytt yxe yxy yye yyt yyy