Reverse Roman Numerals

Created on Dec. 22, 2018 by Julien Palard

Write a function named from_roman_numeral that return the value of a given roman numeral.

Example

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>>> print(from_roman_numeral("V"))
5
>>> print(from_roman_numeral("XX"))
20
>>> print(from_roman_numeral("DCCC"))
800
>>> print(from_roman_numeral("MMMM"))
4000
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