# Roman numerals

Easy

Execution time limit is 1 second

Runtime memory usage limit is 64 megabytes

Count the sum of two natural numbers `A`

and `B`

, which have written in roman system of numeration. You must write the answer in roman system of numeration as well.

`M = 1000`

, `D = 500`

, `C = 100`

, `L = 50`

, `X = 10`

, `V = 5`

, `I = 1`

(all numbers is less 2000).

## 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.

## Examples

Input #1

Answer #1

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