#include <bits/stdc++.h>   using namespace std;   int f[10005];   int vis[100005];   void init() {     f[1] = 1;     f[2] = 1;     vis[1] = 1;     for (int i = 3; i <= 20; i++) {       f[i] = f[i - 1] + f[i - 2];       vis[f[i]] = 1;     }   }   int main() {     int n;     scanf( %d , &n);     init();     for (int i = 1; i <= n; i++) {       if (vis[i] == 1)         printf( O );       else         printf( o );     }     return 0;   }   