import java.util.Scanner;

public class Test {

    public static void main(String[] args){
       Scanner input = new Scanner(System.in);
       int s = input.nextInt();
       int ar1[]=new int [s];
       for(int i=0;i<s;i++){
          if(i==0 || i==1)
            ar1[i]=1;
          else 
            ar1[i]=ar1[i-1]+ar1[i-2];
       }
       for(int i=1;i<=s;i++){
           boolean flag=false;
           for(int j=0;j<s;j++){
              if(i==ar1[j])
                  flag=true;
           }
           if(flag)
               System.out.print("O");
           else
               System.out.print("o");
           flag=false;
       }
    }
}