import java.util.*;

public class SystemProperties {
    public static void main(String[] args) {
        Properties pros = System.getProperties();
        Enumeration emu = pros.propertyNames();
         
        while(emu.hasMoreElements()) {
            String key = (String)emu.nextElement(); 
            String value = System.getProperty(key);
            System.out.println(key + " = " + value);
        }        
    }
}