-er ddd dde ddi ddo ddr ddt ddx de- ded dee dei deo der det dev dex di- did die dii dio dir dit div dix dod doe doi doo dor dot dov dox drd dre dri dro drr drt drv drx dtd dte dti dto dtr dtt dtv dtx dvd dve dvi dvr dvt dvx dxd dxi dxo dxr dxt dxx ed- edd ede edi edo edr edt edx eed eee eeo eer eet eev eex eid eie eii eio eir eit eiv eix eo- eod eoe eoi eoo eor eot erd ere eri ero err ert erv etd ete eti eto etr ett etv etx evd eve evi evo evr evt evv ex- exd exe exi exo exr ext exx i-d i-v idd ide idi ido idr idt idv idx ie- ied iee iei ier iet iev iex iid iie iii iio iir iit iix io- iod ioe ioi ioo ior iot iov ir- ird ire iri iro irr irt irv irx itd ite iti ito itt itv itx ivd ive ivi ivo ivr ivt ivv ivx ixe ixi o-i odd ode odi odo odr odt odv oed oee oei oeo oer oet oex oid oie oii oio oir oit oiv oo- ood ooi ooo oor oot oov oox or- ord ore ori oro orr ort orv orx ot- otd ote oti oto otr ott otv ov- ovd ove ovi ovo ovv ox- oxi oxo oxt oxx rdd rde rdi rdo rdr rdt rdv rdx re- red ree rei reo rer ret rev rex rid rie rii rio rir rit riv rix rod roe roi roo ror rot rov rox rrd rri rrr rrt rtd rte rti rto rtr rtt rtv rtx rvd rve rvi rvo rvr rvt rvv rxr t-x tdd tde tdi tdo tdr tdt tdv tdx te- ted tee tei teo ter tet tev tex tid tie tii tio tir tit tiv tix to- tod toe toi too tor tot tov tox trd tre tri tro trr trt trv trx ttd tte tti tto ttr ttt ttv ttx tvd tve tvi tvo tvr tvt tvx txe txi txt v-e vdd vde vdi vdo vdr vdt vdv vdx ved vee vei veo ver vet vex vi- vid vie vii vio vir vit viv vix vod voe voi voo vor vot vov vox vrd vre vri vrr vrt vte vti vto vtr vtt vtv vtx vvi vvo vvr vvt vvv vxd vxr vxv xde xdi xdr xdt xdv xed xee xer xet xev xex xie xii xio xit xiv xix xod xoi xoo xor xot xov xox xrd xrt xrx xti xtr xtv xtx xvi xvt xxi xxo xxv xxx