nspc Lv 1
-Go in Reaction design tool.
-Select elements that are not the first in each list.
-Accept réaction.
-Come back to the Reaction design tool.
We see : First elemment of each list are selected by default (and not the current of last reaction).
So if I come back to try to change one of the elements, I have to remember and retrive what elements I have selected before (and it is very hard in puzzle 1855)
The elements selected when I come back in reaction design tool should be the current elements in last Reaction.
For puzzle 1855, if we just Accept réaction without changing the elements in selection, we should have the starting arginine again too.