26:T4a9,import java.util.ArrayList; public class Amber { public static ArrayList breakups(String str) { ArrayList result = new ArrayList<>(); if (str.length() <= 1) { result.add(str); } else if (str.length() == 2) { result.add(str); String first1 = str.substring(0, 1); String rest1 = str.substring(1); result.add(first1 + " " + rest1); } else { String first1 = str.substring(0, 1); String rest1 = str.substring(1); ArrayList shorter1 = breakups(rest1); for (String s : shorter1) { result.add(first1 + " " + s); } String first2 = str.substring(0, 2); String rest2 = str.substring(2); ArrayList shorter2 = breakups(rest2); for (String s : shorter2) { result.add(first2 + " " + s); } } return result; } public static void main(String[] args) { ArrayList result = breakups("amber"); for (String element : result) { System.out.println(element); } } }27:T4a9,import java.util.ArrayList; public class Amber { public static ArrayList breakups(String str) { ArrayList result = new ArrayList<>(); if (str.length() <= 1) { result.add(str); } else if (str.length() == 2) { result.add(str); String first1 = str.substring(0, 1); String rest1 = str.substring(1); result.add(first1 + " " + rest1); } else { String first1 = str.substring(0, 1); String rest1 = str.substring(1); ArrayList shorter1 = breakups(rest1); for (String s : shorter1) { result.add(first1 + " " + s); } String first2 = str.substring(0, 2); String rest2 = str.substring(2); ArrayList shorter2 = breakups(rest2); for (String s : shorter2) { result.add(first2 + " " + s); } } return result; } public static void main(String[] args) { ArrayList result = breakups("amber"); for (String element : result) { System.out.println(element); } } }28:T4b5,```java import java.util.ArrayList; public class Amber { public static ArrayList breakups(String str) { ArrayList result = new ArrayList<>(); if (str.length() <= 1) { result.add(str); } else if (str.length() == 2) { result.add(str); String first1 = str.substring(0, 1); String rest1 = str.substring(1); result.add(first1 + " " + rest1); } else { String first1 = str.substring(0, 1); String rest1 = str.substring(1); ArrayList shorter1 = breakups(rest1); for (String s : shorter1) { result.add(first1 + " " + s); } String first2 = str.substring(0, 2); String rest2 = str.substring(2); ArrayList shorter2 = breakups(rest2); for (String s : shorter2) { result.add(first2 + " " + s); } } return result; } public static void main(String[] args) { ArrayList result = breakups("amber"); for (String element : result) { System.out.println(element); } } } ```29:T450,Failed to compile Amber.java:14: error: cannot find symbol result.add(first1 + " " + rest1); ^ symbol: variable first1 location: class Amber Amber.java:14: error: cannot find symbol result.add(first1 + " " + rest1); ^ symbol: variable rest1 location: class Amber Amber.java:18: error: cannot find symbol ArrayList shorter1 = breakups(rest1);

Produce a recursive method for creating substrings of length 1 or 2.

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Produce a recursive method for creating substrings of length 1 or 2.

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