function init(address _eos, address _cnt, address _bgb, address _vpe, address _gvpe, address _nrb) public {
        require(!initialized);
        EOS_address = _eos;
        CNT_address = _cnt;
        BGB_address = _bgb;
        VPE_address = _vpe;
        GVPE_address = _gvpe;
        NRB_address = _nrb;
        PRE_SALE_Token(CNT_address).init(address(this));
        PRE_SALE_Token(BGB_address).init(address(this));
        PRE_SALE_Token(VPE_address).init(address(this));
        PRE_SALE_Token(GVPE_address).init(address(this));
        initialized = true;
    }