'''
Write Python code which transfers decimal numerals into Roman numerals:
I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000

In Roman numerals, it is not allowed to have 4 identical characters 
consecutively. For example, if we want to convert 41 into Roman numerals, 
XXXI is wrong, and XLI is right (think of XLI as 50-10+1).

Exercise A: 
Use a random user input between 1 and 4000 and automatically rewrite it into 
Roman numerals. 

In this part of the exercise, 1249 = MCCXXXXVIII is allowed, so it is OK to 
have 4 consecutive identical characters.
'''

# Your code here

'''
Exercise B: 

Adapt the code in order to check for 4 consecutive identical characters and 
correct the number, such that e.g. 1209 becomes MCCIX.
The largest number is 3999, corresponding to MMMCMXCIX.
'''

# Your code here