This is correct. I chose this definition of "stroke" for simplicity. It's meant as a proxy measure for "difficulty of writing the letter". A better measure migh

This is correct. I chose this definition of "stroke" for simplicity. It's meant as a proxy measure for "difficulty of writing the letter". A better measure might be "median time it takes to write each letter at an acceptable level of legibility", but that would require a lot more effort. The numerical results will depend on the measure of effort, but I suspect the general point will be the same.