Visually impaired and totally blind people have always had to rely in a matter of trust to strangers with their money. The U.S. currency is in similar shape and size across the different denominations. Each bill has a patriots face on one side. Each one of these patriots is wearing a type of clothing that has ridges which can be felt with the finger nail. I propose to change the shape of the ridges to be the Braille system for the number of the bill's denomination.
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