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April 19 (Reuters) - U.S. stock indexes were slightly higher at the open on Tuesday, after a strike by oil workers in Kuwait sparked a rise in crude.
The Dow Jones industrial average rose 31.77 points, or 0.18 percent, to 18,035.93, the S&P 500 gained 4.64 points, or 0.22 percent, to 2,098.98 and the Nasdaq composite added 0.66 points, or 0.01 percent, to 4,960.68. (Reporting by Abhiram Nandakumar in Bengaluru; Editing by Don Sebastian)