Will be really interesting to see if we come up with the same when you post the colour.
As it stands I see:
Dark: 1, 5, 6, 19, 20
Med: 2, 3, 7, 9, 10, 11, 12, 14, 15, 22, 23, 25, 26
Light: 4, 8, 13, 16, 17, 18, 21
Thanks for giving us the opportunity to do this exercise.