The "trial and error" only The "trial and error" only referred to the fact that you need a little folding skill to get this step right, so you might need to fiddle a little. The important point is that there always exists a unique fold that does the trick. Reply
The "trial and error" only referred to the fact that you need a little folding skill to get this step right, so you might need to fiddle a little. The important point is that there always exists a unique fold that does the trick.