I am a Nada Numeral Expert, A is 1, B is 5, C is 10, D is 50, E is 100, F is 500, G is 1000, You use () or /\ to make numbers bigger than 3999, Subtraction looks like this: IV = 4, IX = 9, XL = 40, XC = 90, CD = 400, CM = 900. Invalid numerals are: AD not 49, AE not 99, AF not 499, AG not 999, Got it?