def toRoman(number):

   if number < 1 or number > 3999:
      raise Exception("Number must be >= 1 and <= 3999")

   onesMap = {

      "1": "I",
      "2": "II",
      "3": "III",
      "4": "IV",
      "5": "V",
      "6": "VI",
      "7": "VII",
      "8": "VIII",
      "9": "IX"
   }

   tensMap = {

      "10":  "X",
      "20":  "XX",
      "30":  "XXX",
      "40":  "XL",
      "50":  "L",
      "60":  "LX",
      "70":  "LXX",
      "80":  "LXXX",
      "90":  "XC"
   }

   hundredsMap = {

      "100":  "C",
      "200":  "CC",
      "300":  "CCC",
      "400":  "CD",
      "500":  "D",
      "600":  "DC",
      "700":  "DCC",
      "800":  "DCCC",
      "900":  "CM"
   }

   thousandsMap = {

      "1000":  "M",
      "2000":  "MM",
      "3000":  "MMM"
   }

   result = ""
   value  = number

   all = [ thousandsMap, hundredsMap, tensMap, onesMap ]
   i   = 1000

   for theMap in all:
      
      if value >= i:
         result += theMap[str(value - value % i)]

      value %= i
      i    //= 10

   return(result)

# -------------------------------
# Script Begins Here
# -------------------------------

for i in range(1, 4000):
   print("{0} => {1}".format(i, toRoman(i)))