# Cube - a three-dimensional array (3x3x3)

cube = [[[':(', 'x', 'x'],
         [':)', 'x', 'x'],
         [':(', 'x', 'x']],

        [[':)', 'x', 'x'],
         [':(', 'x', 'x'],
         [':)', 'x', 'x']],

        [[':(', 'x', 'x'],
         [':)', 'x', 'x'],
         [':)', 'x', 'x']]]

print(cube)
print(cube[0][0][0]) # outputs: ':('
print(cube[2][2][0]) # outputs: ':)'

for i in range(-1,1):
    print('#')


lst = [3,1,-1]
lst[-1]=lst[-2]
print(lst)
