RomanNumerals

Write a method String convert(int) that takes a number and converts it to the according String representation.

Examples

   1 ➔ I
   2 ➔ II
   3 ➔ III
   4 ➔ IV
   5 ➔ V
   9 ➔ IX
  21 ➔ XXI
  50 ➔ L
 100 ➔ C
 500 ➔ D
1000 ➔ M