public static void Test()
{
Solution s = new Solution();
string[] a4 = new[] { "cba", "daf", "ghi" };
a4.PrintList();
Console.WriteLine(s.MinDeletionSize(a4) + " is 1");
string[] a = new[] { "a", "b" };
a.PrintList();
Console.WriteLine(s.MinDeletionSize(a) + " is 0");
string[] a2 = new[] { "zyx", "wvu", "tsr" };
a2.PrintList();
Console.WriteLine(s.MinDeletionSize(a2) + " is 3");
}