Yet Another Roman Numeral Problem

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Problem

Given two roman numerals between 1 (I) and 4 (IV), print their sum.

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Sample input:_

II II
IV II
III I
I III
II III
IV I
III IV
III IV
IV IV
I II
II IV
II I
I III
III III
III II
I II
II III
IV I
I IV
II I
IV IV
II III
III III
II III
III I

Sample output:

IV
II
IV
IV
V
I
III
III
VIII
III
II
III
IV
VI
V
III
V
I
I
III
VIII
V
VI
V
IV

Sample input:_

III I
I III
I I
III I
II I
IV II
I I
IV IV
I I
I I
IV III
I I
IV I
IV IV
II I
III II
IV II
III IV
II I
III IV
II I
II II
IV I
II IV
II III

Sample output:

IV
IV
II
IV
III
II
II
VIII
II
II
III
II
I
VIII
III
V
II
III
III
III
III
IV
I
II
V

Sample input:_

IV I
I III
IV IV
III III
IV IV
II II
I III
II III
II I
IV II
I IV
IV III
III I
II IV
IV III
IV I
II I
III I
IV III
I II
II I
IV IV
I I
II II
III I

Sample output:

I
IV
VIII
VI
VIII
IV
IV
V
III
II
I
III
IV
II
III
I
III
IV
III
III
III
VIII
II
IV
IV

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