#A4----------------------------------------------
box b1 40 40 15
profile p o 15 10 5 l 10 c 5 90 l 10 c 5 90 l 10 \
c 5 90 l 10 c 5 90
prism p p 0 0 20
bfuse f b1 p
nexplode f f
depouille result f 0 0 1 f_12 10 0 0 25 0 0 1

set square 6245.73