## {4,4}, pentomino 12 (P), solution 18
e2.
angleunit(pi/2)
# the line below lets us specify internal angles
angleofs(pi)
unittile(1,1,2,2,1,2,1,2,1,3)
# the Conway notation
conway("(0 8)(1)(2 7)[3 5][4 6](9)")
sublines(1)
sublines(2)