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Jan 22nd, 2018
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  1. if (Regex.IsMatch(input, "[0-9]:[a-zA-Z0-9]:[a-zA-Z0-9]@[a-zA-Z0-9]") == true)
  2. {
  3. Console.WriteLine("Correct.");
  4. }
  5.  
  6. [0-9]+:[a-zA-Z0-9]+:[a-zA-Z0-9]+@[a-zA-Z0-9]+
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