Create an infinite element's pile/pick/deck for a drag'n' drop question

Hello everyone,

I want to create two element's pile like answers item. Theses piles are infinite and only one item can be drag'n drop on 1 area. Areas can be receive each type of item but only 1 is good (and the validation doesn't depend to element but type of element)

there is a attachement for a good comprehension of my problem.

Can i have help please :) (i'm french, so i have an average english)

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