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There are 24 sets.

3, 5

5, 7

11, 13

17, 19

29, 31

41, 43

59, 61

71, 73

101, 103

107, 109

137, 139

149, 151

179, 181

191, 193

197, 199

227, 229

239, 241

269, 271

281, 283

311, 313

347, 349

419, 421

431, 433

461, 463

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10y ago

What else can I help you with?