## {4,4}, domino 1F + domino 1F, solution 19
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](2 0')(3 5')(4 4')[5][1'][2'][3']")
sublines(1)