Random rand = new Random();
int code = rand.Next(920,939);
int num = rand.Next(100,999);
int num2 = rand.Next(10,99);
int num3 = rand.Next(10,99);
string result = " " + code.ToString() + " " + num.ToString() + " " + num2.ToString() + " " + num3.ToString();
return result;
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