Gah this took forever for me to figure out, but something that ought to help people with the piano; get piece of paper from living room. We all receive different numbers which makes this most difficult to explain. My numbers were 6,4,2,1,5,3 (yours will be different). You will notice that above this group of numbers are six symbols each either beginning with a L or R. The L and the R indicate the direction from which you start and the number of lines indicate which key to press. L(5lines)(5lines)(4lines) would mean start from the Left and press the 14th key. R(5lines)(5lines)(5lines)(2lines) would mean select the key 17th from the Right. In my example I had the numbers 6,4,2,1,5,3 . You will also notice that there are 6 total L and R's. Each L and R is a group. So, in my example, the first key that I select on the piano is what I have as the 6th group of symbols L(25). The second key i press is the 4th group R(13). My third key is the 2d group L(23), my fouth key is the 1st group R(9), 5th key is my 5th group L(1) and the last key corresponds to the 3rd grouping of symbols L(16)
Something that I found that helped me is to have the window with the game open (but not taking up the whole screen) and have the note paper open. Then hit PrtSc, and paste that in Paint. Then you can quickly see what the numbers are and you won't waste time re-looking at the paper!
Hope this helps!