Consider the self-organising map below, which shows the h values calculated using a Gaussian neighbourhood function. Which instance is the best matching unit? Provide your answer in the format x,y, where x represents the row and y represents the column. Do not include any spaces.

                1             2             3

1             1.000    0.607    0.135

2             0.607    0.368    0.082

3             0.135    0.082    0.018