import re
def f(x,r=""):
 for v,i in(5,"V"),(4,"IV"),(1,"I"):
  while x>=v:r+=i;x-=v
 return r
s="I"
for i in[0]*int(input()):print(s);s=re.sub(r'(.)\1*',lambda m:f(len(m.group()))+m.group()[0],s)