print1619. Roman numerals

printRoman numerals

Ограничения: время – 1s/2s, память – 32MiB Ввод: input.txt или стандартный ввод Вывод: output.txt или стандартный вывод copy
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Using roman numerals the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9 are written as 'I', 'II', 'III', 'IV', 'V', 'VI', 'VII', 'VIII', 'IX'. Numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 are written as 'X', 'XX', 'XXX', 'XL', 'L', 'LX', 'LXX', 'LXXX', 'XC'.
Any number smaller than 100 can be written by converting tens and ones separately and concatenating the results. So, for example, the number 48 would be written as XLVIII, XL for 40 and VIII for 8.
Given a number written in roman numerals, rearrange it's characters so that you create the smallest possible number, written in roman numerals.
Input
The first and only line of input contains one integer `B` (`1\ ≤\ B\ <\ 100`), written using roman numerals.
Output
The first and only line of output should contain a rearrangement of input characters so that it represents the smallest possible number, written in roman numerals.

Sample Input 1

VII

Sample Output 1

VII

Sample Input 2

VI

Sample Output 2

IV

Sample Input 3

III

Sample Output 3

III
Source: COCI 2009/2010 contest #2
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