using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
public class MainClass {
public static void Main() {
string[] presidents = {"G", "H", "a", "H", "over", "Jack"};
string[] names = presidents.OfType<string>().ToArray();
foreach (string name in names)
Console.WriteLine(name);
}
}
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