Converts climbing grades from the French/Yosemite Decimal System (USA) to the AUS equivalent.
Traditionally, the first-ascentionist of a rock climb assign a climbing grade corresponding to the difficulty of the route. The climbing grade system differs across the word. This program aims to provide an en effective way of converting climbing grades from the Yosemiti Decimal (USA) and the French system into the Australian form (Ewbank).
Input - climbing grade (in USA or French form)
Output - climbing grade (Ewbank system).