//Reverse an array without affecting special characters

//Given a string, that contains special character together with alphabets (‘a’ to ‘z’ and ‘A’ to ‘Z’), reverse the string in a way that special characters are not affected.

​

//Examples:

//Input:   str = "a,b$c"

//Output:  str = "c,b$a"

//Note that $ and , are not moved anywhere.  

//Only subsequence "abc" is reversed

​

//Input:   str = "Ab,c,de!$"

//Output:  str = "ed,c,bA!$"

​

using System; 

public class ReverseStringExceptSpecialCharacters  

{  

    public static void reverse(char []str)  

    {  

    }  

​

    public static void Main()  

    {  

        String str = "a!!!b.c.d,e'f,ghi";  

        //Console.WriteLine("Output string: " + reverseString);  

    }  

}