## {4,4}, domino 1F + domino 1F, solution 9
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)(1 1')(2 5')(3 3')(4)(5 2')(0')(4')")
sublines(1)