vether.sol:
contract Vether4 is ERC20 {
 constructor() public {
       ...
        vether2 = 0x01217729940055011F17BeFE6270e6E59B7d0337;                               // Second Vether
        vether3 = 0x75572098dc462F976127f59F8c97dFa291f81d8b;
        ...
        totalBurnt = VETH(vether2).totalBurnt(); totalFees = 0;
