Assuming that the following classes have been defined:

public class Water extends Earth $\{$

public void method$1()\{$

System.out.println$("$Water $1")$;

$\}$

public void method$3()\{$

System.out.println$("$Water $3")$;

$\}$

$\}$

public class Fire $\{$

public void method$1()\{$

System.out.println$("$Fire $1")$;

$\}$

public void method$2()\{$

System.out.println$("$Fire $2")$;

method$1()$;

$\}$

$\}$

public class Earth extends Fire $\{$

public void method$1()\{$

System.out.println$("$Earth $1")$;

super.method$1()$;

$\}$

$\}$

public class Air extends Fire $\{$

public void method$3()\{$

System.out.println$("$Air $3")$;

$\}$

$\}$