:warning: this fails if you want to look for flare larger than 'X2' you don't get flares between 'X10' to 'X19'.  This is a common problem when ordering GOES classes...   The problem is not from this PR, but the way HEK works (don't know if it's our problem or HEK problem).  I just think this should be noticed till HEK takes care of it.  For now this will not count flares larger than `X > 10` as with the other  class they are in alphabetical order (ie. `A < B < C < M < X`)

I've created an issue to track this problem: #1005