Roman numerals

Count the sum of two natural numbers А and В, which have written in roman system of numeration. The answer you must write too in roman system of numeration.

М = 1000, D = 500, С = 100, L = 50, X = 10, V = 5, I = 1 (all numbers is less 2000).

Specifications

Input

In line wrote two number of roman system numeration, between which stand mark "+".

Output

One number, sum of numbers is roman system numeration too. Numbers in roman system numeration wrote big Latin letters.

Problem information

Time Limit: 1 seconds
Memory Limit: 64 MB
Balls for the passed test: 10
Complexity: 33% 338/503
Classes: Calculation system

Example

Example input

VII+II

Example output

IX

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Problems

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