Coordinate Test

There is a kind of practice which measures how well you know the coordinates of the chessboard by prompting you to click on the coordinate given in standard notation ( like E2, G5, C7 ) and your score is the amount of correct clicks within a given time. Tactics trainer is a common feature, but I have not seen such a training before. It is not as easy as you may think.

I wonder what your score is at this test:

http://hu.lichess.org/training/coordinate