public class Compressor
{
   public String compressImage(String imageColors)
   {
      String result = "";
      char bufferLetter = imageColors.charAt(0);
      int bufferNumber = 1;

      for(int i = 1; i < imageColors.length(); i++)
      {
         if(imageColors.charAt(i) == bufferLetter)
         {
            bufferNumber++;
         }
         else
         {
            result += Integer.toString(bufferNumber);
            result += bufferLetter;
            bufferLetter = imageColors.charAt(i);
            bufferNumber = 1;
         }
      }
      result += Integer.toString(bufferNumber);
      result += bufferLetter;
      return result;
   }
}