Basic Examples
(
1
)
Tetris consists of rank-4 polyominoes:
I
n
[
5
3
]
:
=
[
◼
]
P
o
l
y
o
m
i
n
o
[
4
]
O
u
t
[
5
3
]
=
,
,
,
,
S
c
o
p
e
(
1
)
N
e
a
t
E
x
a
m
p
l
e
s
(
3
)