-er a-a a-t aaa aad aae aar aat aav aax ad- ada add ade adr adt adv adx aea aed aee aer aet aev aex ar- ara ard are arr art arv arx at- ata atd ate atr att atv atx av- ava avd ave avr avt avx ax- axa axe axr axt axv axx daa dad dae dar dat dav dax dda ddd dde ddr ddt ddx de- dea ded dee der det dev dex dra drd dre drr drt drv drx dta dtd dte dtr dtt dtv dtx dva dvd dve dvr dvt dvx dxd dxr dxt dxx eaa ead eae ear eat eav eax ed- eda edd ede edr edt edx eea eed eee eer eet eev eex era erd ere err ert erv eta etd ete etr ett etv etx eva evd eve evr evt evv ex- exa exd exe exr ext exx ra- raa rad rae rar rat rav rax rda rdd rde rdr rdt rdv rdx re- rea red ree rer ret rev rex rra rrd rrr rrt rta rtd rte rtr rtt rtv rtx rva rvd rve rvr rvt rvv rxr t-x taa tad tae tar tat tav tax tda tdd tde tdr tdt tdv tdx te- tea ted tee ter tet tev tex tra trd tre trr trt trv trx tta ttd tte ttr ttt ttv ttx tva tvd tve tvr tvt tvx txe txt v-a v-e vaa vad vae var vat vav vax vdd vde vdr vdt vdv vdx vea ved vee ver vet vex vra vrd vre vrr vrt vta vte vtr vtt vtv vtx vva vvr vvt vvv vxa vxd vxr vxv xaa xad xar xat xav xda xde xdr xdt xdv xed xee xer xet xev xex xrd xrt xrx xtr xtv xtx xvt xxv xxx