import java.util.HashMap;
import java.util.Map;

public class Test {
    
    public static void main(String [] args) {
        Map<String,String> map = new HashMap<String, String> ();
        map.put(String.valueOf(System.currentTimeMillis()) + "a", "1");
        map.put(String.valueOf(System.currentTimeMillis()) + "b", "2");
        map.put(String.valueOf(System.currentTimeMillis()) + "c", "3");
        System.out.println(map);
    }
    
}