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NEW YORK ( TheStreet) -- Here's what Jim Cramer had to say about some of the stocks callers offered up during the "Mad Money Lightning Round" on CNBC Friday night: PDC Energy ( PDCE): Thanks to its shale operations, this stock is a buy, buy, buy, Cramer said. Finistar ( FNSR): "I'm going to take a pass. I don't like the group much because I don't like the customers." UnitedHealthcare ( UNH): It's good. Buy it. Hovnanian ( HOV): No, I'm not going there," he said, preferring Toll Brothers ( TOL). Merrimack Pharmaceuticals ( MACK): Calling it a speculative stock, he urged callers to "buy more" and "stick with it." Cabela's ( CAB): Despite a spate of warm weather affecting this "cold weather stock," Cramer urged viewers to buy, buy, buy. American Capital Agency ( AGNC): "Buy it." To read a full recap of "Mad Money" on CNBC, click here. To sign up for Jim Cramer's free Booyah! newsletter with all of his latest articles and videos please click here. To watch replays of Cramer's video segments, visit the Mad Money page on CNBC. -- Written by Margo D. Beller in New York.