## {4,4}, domino 1F + domino 1F, solution 15
e2.
angleunit(pi/2)
# the line below lets us specify internal angles
angleofs(pi)
unittile(1,1,2,1,1,2)
unittile(1,1,2,1,1,2)
# the Conway notation
conway("(0 3)(1 0')(2 1')[4 4'][5 3'](2' 5')")
sublines(1)