## {4,4}, pentomino 7 (N), solution 19
e2.
angleunit(pi/2)
# the line below lets us specify internal angles
angleofs(pi)
unittile(1,1,2,1,3,2,1,1,2,2,1,3)
# the Conway notation
conway("(0 10)[1 8](2 6)(3 5)(4)[7 9](11)")
sublines(1)