Some elementary symbols used to built impossible structures [Quelques 'symboles' élémentaires utilisés pour la construction de structures paradoxales].
Used codes (alphabetical order):
V W X Y
S T U
O P Q R
L M N
H I J K
E F G
A B C D
V
W
X
Y
S
T
U
O
P
Q
R
L
M
N
H
I
J
K
E
F
G
A
B
C
D
See the whole set of impossible symbols (pattern order):