Designation of Additional Attorney-in-Fact
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        KNOW ALL PERSONS BY THESE PRESENTS that Yvette Kosic, a duly appointed
attorney-in-fact of GSCP V ADVISORS, L.L.C. (the "Company"), pursuant to that
Power of Attorney, dated April 12, 2006 (the "POA"), does hereby designate Kevin
P. Treanor, an employee of The Goldman Sachs Group, Inc. (the "Firm"), as an
additional attorney-in-fact, with the same authority to act as provided to the
undersigned and the other attorneys-in-fact named in the POA.

        This Designation of Additional Attorney-in-Fact (this "Designation")
shall not affect the continued power of the undersigned or the other named
attorneys-in-fact to act under the POA to the full extent permitted thereby.
This Designation shall remain in full force and effect until either it or the
POA is revoked in writing by the Company or the Firm, or until such time as the
person or persons to whom power of attorney has been hereby granted cease(s) to
be an employee of the Firm or one of its affiliates.

        IN WITNESS WHEREOF, the undersigned has duly subscribed these presents
as of April 2, 2012.

/s/ Yvette Kosic
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Yvette Kosic
Attorney-in-Fact