import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
 
class _16319749 {
    public static void main(String[] args) {
        nonregex();
        regex();
    }
 
    public static void nonregex() {
        String poem = "In software, a stack overflow [apple] occurs"
                + " when too much memory [orange] is used on the call stack [banana]."
                + " The call stack [pear] contains a limited amount of memory,"
                + " often determined at the start of the program [apple].";
 
        HashMap<String, String> rep = new HashMap<String, String>();
 
        rep.put("[apple]", "<img src='apple.jpg' />");
        rep.put("[banana]", "<img src='banana.jpg' />");
        rep.put("[orange]", "<img src='orange.jpg' />");
        rep.put("[pear]", "<img src='pear.jpg' />");
 
        for (String fruit : rep.keySet())
            poem = poem.replace(fruit, rep.get(fruit));
 
        System.out.println(poem);
    }
 
    public static void regex() {
        String poem = "In software, a stack overflow [apple] occurs"
                + " when too much memory [orange] is used on the call stack [banana]."
                + " The call stack [pear] contains a limited amount of memory,"
                + " often determined at the start of the program [apple].";
 
        List<String> fruits = new ArrayList<String>();
        fruits.add("[apple]");
        fruits.add("[banana]");
        fruits.add("[pear]");
        fruits.add("[orange]");
 
        String pattern = "\\[(?<=\\[)(\\w+)(?=])\\]";
        poem = poem.replaceAll(pattern, "<img src='$1.jpg' />");
 
        System.out.println(poem);
    }
}
 

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