contract Ownable {
  address public owner;
  address public admin;

  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  constructor() public {
    owner = msg.sender;
  }


  /**
   * @dev Throws if called by any account other than the owner.
   */
  modifier onlyOwner() {
    require(msg.sender == owner);
    _;
  }

  modifier onlyOwnerOrAdmin() {
    require(msg.sender != address(0) && (msg.sender == owner || msg.sender == admin));
    _;
  }

  /**
   * @dev Allows the current owner to transfer control of the contract to a newOwner.
   * @param newOwner The address to transfer ownership to.
   */
  function transferOwnership(address newOwner) onlyOwner public {
    require(newOwner != address(0));
    require(newOwner != owner);
    require(newOwner != admin);

    emit OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

  function setAdmin(address newAdmin) onlyOwner public {
    require(admin != newAdmin);
    require(owner != newAdmin);

    admin = newAdmin;
  }
}
function transferOwnership(address newOwner) onlyOwner public {
    require(newOwner != address(0));
    require(newOwner != owner);
    require(newOwner != admin);

    emit OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }
/**
 * @dev Allows the current owner to transfer control of the contract to a newOwner.
 * @param newOwner The address to transfer ownership to.
 */