import java.util.*;
import java.lang.ref.*;

class gc {
    static volatile boolean FLAG = true;
    public static void main(String[] argv) {
        long counter = 0;
        var map = new HashMap<String, String>();
        while (FLAG) {
            map.put(new String("key: " + counter), new String("value: " + counter));
            counter = counter + 1;
        }
    }
};