def europeanToRoman(number)
  romanNumber = ""
  while(number > 999)
    number-=1000
    romanNumber = romanNumber + "M"
  end
  if(number > 499)
    romanNumber = romanNumber + "D"
    number-=500
  end
  while(number > 99)
    romanNumber = romanNumber + "C"
    number-=100
  end
  if(number > 49)
    romanNumber = romanNumber + "L"
    number-=50
  end
  while(number > 9)
    romanNumber = romanNumber + "X"
    number-=10
  end
  if(number > 4)
    romanNumber = romanNumber + "V"
    number-=5
  end
  while(number > 0)
    romanNumber = romanNumber + "I"
    number-=1
  end

  return romanNumber
end
puts europeanToRoman(gets.chomp.to_i)