import java.io.*;
import java.util.Arrays;
import java.util.StringTokenizer;

public class A {

    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);
        int n = sc.nextInt();
        int[] a = new int[n];
        a[0] = 1;
        if(n > 1) a[1] = 2;
        for(int i = 2; i < n; i++)
            a[i] = a[i-1] + a[i-2];
        char[] name = new char[n];
        Arrays.fill(name, 'o');

        for(int i = 0; i < n && a[i] <= n; i++)
            name[a[i] - 1] = 'O';
        for(char c : name) out.print(c);
        out.flush();
        out.close();
    }


    static class Scanner
    {
        StringTokenizer st;
        BufferedReader br;

        public Scanner(InputStream system) {br = new BufferedReader(new InputStreamReader(system));}
        public Scanner(String file) throws Exception {br = new BufferedReader(new FileReader(file));}
        public String next() throws IOException
        {
            while (st == null || !st.hasMoreTokens())
                st = new StringTokenizer(br.readLine());
            return st.nextToken();
        }
        public String nextLine()throws IOException{return br.readLine();}
        public int nextInt() throws IOException {return Integer.parseInt(next());}
        public double nextDouble() throws IOException {return Double.parseDouble(next());}
        public char nextChar()throws IOException{return next().charAt(0);}
        public Long nextLong()throws IOException{return Long.parseLong(next());}
        public boolean ready() throws IOException{return br.ready();}
        public void waitForInput() throws InterruptedException {Thread.sleep(3000);}
    }
}
