Split into substrings

    public static List<String> splitSubString(String name){

 if (!(name.length() % 2 ==0)){
        name  = name + "_";
    }

    List<String> items = new ArrayList<>();


    for (int i = 0; i < name.length() ; i = i+ 2) {

       items.add( name.substring(i,i+2));

    }

    return items;
     }