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The connection between 2 and 3 is blocked.
Even if you assume that it is not blocked, it is still 5. The pipe from 2 to 3 is never reached because 4 leaks out the hole in the bottom. Assume that the hole in the bottom is a flaw and 4 still leaks out the top before the pipe to 3 is reached.
Didn’t notice that.
Damn, I didn’t even notice that.