#include <bits/stdc++.h>
using namespace std;
int main() { int n ;
cin >> n ;
for ( int i = 1 ; i <= n ; i++){
int spaces = i ;
if ( i > n/2 ) spaces = n-i-1 ;
for (int j = 0 ; j < spaces ; j++) cout <<" " ;
for ( int j = 0 ; j < n-2*spaces ; j++) cout << "o" ;
cout << endl ;
}
}
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