import os
import sys
from math import *
from collections import *

# from fractions import *
# from heapq import*
from bisect import *
from io import BytesIO, IOBase


def vsInput():
    sys.stdin = open("input.txt", "r")
    sys.stdout = open("output.txt", "w")


BUFSIZE = 8192


class FastIO(IOBase):
    newlines = 0

    def __init__(self, file):
        self._fd = file.fileno()
        self.buffer = BytesIO()
        self.writable = "x" in file.mode or "r" not in file.mode
        self.write = self.buffer.write if self.writable else None

    def read(self):
        while True:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            if not b:
                break
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines = 0
        return self.buffer.read()

    def readline(self):
        while self.newlines == 0:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            self.newlines = b.count(b"\n") + (not b)
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines -= 1
        return self.buffer.readline()

    def flush(self):
        if self.writable:
            os.write(self._fd, self.buffer.getvalue())
            self.buffer.truncate(0), self.buffer.seek(0)


class IOWrapper(IOBase):
    def __init__(self, file):
        self.buffer = FastIO(file)
        self.flush = self.buffer.flush
        self.writable = self.buffer.writable
        self.write = lambda s: self.buffer.write(s.encode("ascii"))
        self.read = lambda: self.buffer.read().decode("ascii")
        self.readline = lambda: self.buffer.readline().decode("ascii")


sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")
ALPHA = "abcdefghijklmnopqrstuvwxyz/"
M = 1000000007
EPS = 1e-6


def Ceil(a, b):
    return a // b + int(a % b > 0)


def value():
    return tuple(map(int, input().split()))


def array():
    return [int(i) for i in input().split()]


def Int():
    return int(input())


def Str():
    return input()


def arrayS():
    return [i for i in input().split()]


# -------------------------code---------------------------#



for _ in range(1):
    n=int(input())
    have=[0,1]
    for x in range(n):
       have.append(have[len(have)-1]+have[len(have)-2])
    fib=set(have)
    ans=[]
    for x in range(n):
        if x+1 in fib:
            ans.append("O")
        else:
            ans.append("o")
    print(*ans,sep="")






