n = int(raw_input())
l = [0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946]
k  = ''
for i in range(n):
  if i+1 in l:
    k+="O"
  else:k+="o"
print k
  