public class ReplaceCharacters{

   public static void main(String[] args){

      String str = "Hello BuggyBread";

      

      char[] charArray = str.toCharArray();

      int countCharacter = str.length();

      for(int count=0;count<countCharacter;count++){

         if(charArray[count] == 'g'){

            charArray[count] = 'd';

         }

      }

      String replacedString = new String(charArray).toString();

      

      System.out.println(replacedString);

   }

}