print holder

/**
     * Function name: printPlaceHolder
     * @param placeholder
     * Inside the function
     *   1. print the placeholder
     */
    public static void printPlaceHolder(char[] placeholder){
        for(int i=0; i<placeholder.length; i++){
            System.out.print(" " + placeholder[i]);
        }
        System.out.println("\n");

    }