using System;

class compression

{

public class Compression_Letters

{

public static void printCompression(String str)

{

        int n = str.Length;

        for (int i = 0; i < n; i++)

        {          

            int count = 1;

            while (i < n - 1 && str[i] == str[i + 1])

            {

                count++;

                i++;

            }

            Console.Write(str[i]);

            Console.Write(count);

        }

    }

    public static void Main(String[] args)

    {

        String str = "wwwwaaadexxxxxxywww";

        printCompression(str);

    }

}

}

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