class prog6 {
              public static void main(String[] args) {
              // Create a StringBuffer
              StringBuffer stringBuffer = new StringBuffer("Hello, ");
              
              // Print the original StringBuffer
              System.out.println("\nOriginal StringBuffer: " + stringBuffer);
              
              // String to insert
              String toInsert = "World!";
              
              // Index at which to insert the string
              int insertIndex = 7;
              
              // Insert the string into the StringBuffer
              stringBuffer.insert(insertIndex, toInsert);
              
              // Print the modified StringBuffer
              System.out.println("Modified StringBuffer: " + stringBuffer);
              }
              }