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more like this pls, makes fun to puzzle ^^

Simple stuff.
A will never fill over the pipe to B until B is full.
B will never go above the pipe to C before C is full.
C will push to D then J
D has a hole in the bottom so everything will drop to G

So G will fill up first!

That was fun for about 10 seconds.
Please post more.

The answer is G.🙆