13D Filing: Franklin Resources Inc and Halcon Resources Corporation (HK)

      CUSIP NO.  40537Q506                                                                           Page 12 of 15

                                                  EXHIBIT B

                                            JOINT FILING AGREEMENT

      In accordance with Rule 13d‑1(k) under the Securities Exchange Act of 1934, as amended, the undersigned

      hereby agree to the joint filing with each other of the attached statement on Schedule 13D and to all

      amendments to such statement and that such statement and all amendments to such statement are made on

      behalf of each of them.

      IN WITNESS WHEREOF, the undersigned hereby execute this agreement as of August 30, 2017.

Franklin Resources, Inc.

Charles B. Johnson

Rupert H. Johnson, Jr.

Franklin Custodian Funds on behalf of

                         Franklin Income Fund

By:   /s/LORI A. WEBER

      ‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑ 

     Lori A. Weber

     Assistant Secretary of Franklin Resources, Inc.

     Attorney‑in‑Fact for Charles B. Johnson pursuant to a Limited Power of Attorney

     attached to this Schedule 13D

     Attorney‑in‑Fact for Rupert H. Johnson, Jr. pursuant to a Limited Power of Attorney

     attached to this Schedule 13D

     Vice President and Assistant Secretary of Franklin Custodian Funds

 Franklin Advisers, Inc.

By:   /a/ALISON E. BAUR                

      ‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑

      Alison E. Baur

      Assistant Secretary of Franklin Advisers, Inc.