Having lost his sight at the age of three following an accident, Braille went on to attend the National Institute for Blind Youth in Paris. While there, he began developing a system of raised dots representing letters to facilitate reading and writing among the visually impaired. This evolved into Braille, a writing system for the blind, which was later extended to include notations for mathematics and music. Braille’s invention was inspired by another writing system designed for what purpose? Discuss