What is the output of the code below?

def one$()$:

$x=$ 'fox'

print$(x)$

def two$()$:

global $x$

$x=$ 'dog'

print$($x$)$

one$()$

print$($x$)$

def three$()$:

$x=$ 'rat'

$x=$ 'fish'

print $(x)$

two$()$

print$(x)$

print$($three$())$