## {4,4}, square 1F + tromino 2F, solution 21
e2.
angleunit(pi/2)
# the line below lets us specify internal angles
angleofs(pi)
unittile(1,1,1,1)
unittile(1,1,2,1,2,1,1,3)
# the Conway notation
conway("[0](1 0')(2 7')(3 2')[1'](3' 6')(4')(5')")
sublines(1)