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