using System;

​

//Find if the string is permutation of a given string

public class StringPermutation

{

    public static void Main()

    {

        string str = "abcdef";

        string permStr = "cdfa";

        for ( int i = 0; i <= permStr.Length -1; i++)

        {

            if(str.IndexOf(permStr[i]) == -1)

            {

                Console.WriteLine("String is not a permutation");

                return;

            }

        }

        Console.WriteLine("String is a permutation");

    }

}