r={0:'',1:'I', 2:'II', 3:'III',4:'IV',5:'V',6:'VI',7:'VII', 8:'VIII',9:'IX',10:'X',20:'XX',30:'XXX', 40:'XL',50:'L',60:'LX',70:'LXX',80:'LXXX',90:'XC',100:'C', 200:'CC',300:'CCC',400:'CD',500:'D',600:'DC',700:'DCC',800:'DCCC',900:'CM',1000:'M',2000:'MM', 3000:'MMM'}
s=a=int(input ('Enter a No.: '))
n=10**((len(str(a)))-1) 
s=a
v=" "
while n!=0.1:
   x=s-(s%n)
   v+=r[x]
   s=s%n
   n=n/10
print(v)
