# Roman2.py
# Author: Hyung-Joon Kim
#         CSE, University of Washington

def Roman2(x):
  # Roman numeral conversion with ordered Production System
  ans = ''  
  while True:      
      if x > 3999:
          return '<b>The number is too big.</b>';
      elif x > 999:
          ans += 'M'; x -= 1000
      elif x > 899:
          ans += 'CM'; x -= 900
      elif x > 499:
          ans += 'D'; x -= 500
      elif x > 399:
          ans += 'CD'; x -= 400
      elif x > 99:
          ans += 'C'; x -= 100
      elif x > 89:
          ans += 'XC'; x -= 90
      elif x > 49:
          ans += 'L'; x -= 50
      elif x > 39:
          ans += 'XL'; x -= 40
      elif x > 9:
          ans += 'X'; x -= 10
      elif x == 9:
          ans += 'IX'; x = 0
      elif x > 4:
          ans += 'V'; x -= 5
      elif x == 4:
          ans += 'IV'; x = 0
      elif x > 0:
          ans += 'I'; x -= 1
      elif x == 0:
          return "The converted Roman numeral : " + ans;
      else: return 'bad number'; break