private void StringFunctions_Click(object sender, EventArgs e)
{
StringProblems functions = new StringProblems();
functions.permutation("abcd".ToCharArray(), 0);
char[] arr = new char[4];
functions.combination("abc".ToCharArray(), 3, 0, new StringBuilder());
functions.reverseWord("This is a book.");
StringProblem.StringProblems.DeleteBandACfromString("bcabcacabca".ToCharArray());
StringProblem.StringProblems.countWords("this is a book.");
StringProblem.StringProblems.compressString();
StringProblem.StringProblems.deCompressString();
}