# Problem D: When in Rome...

**Input file:** `rom.in`

**Output file:** `rom.out`

If the Roman Empire had not fallen, then Rome would surely have
discovered electricity and used electronic calculators; however, the
Romans used Roman Numerals! Your task is to implement a simple
Roman Calculator which accepts two Roman Numerals and outputs the
sum in Roman Numerals. You may assume that numbers greater than
1000 will not occur in the input. Output numbers greater than 1000
are illegal and should generate the message
`CONCORDIA CUM VERITATE`
(In Harmony with Truth).

The input consists of a number, indicating the number of test cases,
followed by this many test cases. Each test case consists of a single
line with two numbers in Roman Numerals separated by a `+`

along with an `=`

at the end. There are no separating spaces.

For each test case the output is a copy of the input with the Roman
Numeral that represents the sum. Outputs for different test cases are
separated by a blank line.

## Roman Research

The Roman Numerals used by the Romans evolved over many years, and
so there are some variations in the way they are written. We will
use the following definitions:

- The following symbols are used:
`I`

for 1,
`V`

for 5,
`X`

for 10,
`L`

for 50,
`C`

for 100,
`D`

for 500, and
`M`

for 1000.
- Numbers are formed by writing symbols from 1. from left to right,
as a sum, each time using the symbol for the largest possible value.
The symbols
`M`

, `C`

, `X`

, or
`I`

may be used at most three times in succession.
Only if this rule would be violated, you can use the following rule:
- When a single
`I`

immediately precedes a `V`

or
`X`

, it is subtracted. When a single `X`

immediately precedes an `L`

or `C`

, it is subtracted.
When a single `C`

immediately precedes a `D`

or
`M`

, it is subtracted.

For example: `II`

= 2; `IX`

= 9;
`CXIII`

= 113; `LIV`

= 54; `XXXVIII`

= 38;
`XCIX`

= 99.

## Sample input

3
VII+II=
XXIX+X=
M+I=

## Sample output

VII+II=IX
XXIX+X=XXXIX
M+I=CONCORDIA CUM VERITATE