The student inspects the shelf regularly.
text: You should start by taking one of the shelves and put it standing on the table, laying on the longest side.
text: So put it up on the table and please turn it around so it's on the longest side.
text: So the longest side should be on the table so it's more stable.
text: So please just rotate it like ninety degrees left or right.
text: So now ninety degrees in, towards your direction.
text: Yes, perfect.
text: And you can start assembling a first leg with this shelf.