## {4,4}, square 1F + tromino 2F, solution 20
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](2 1')(3 4')(0' 5')[2'][3'](6' 7')")
sublines(1)