import java.io.*;

class Main{
    static StreamTokenizer in = new StreamTokenizer(new  BufferedReader(new InputStreamReader(System.in)));
    static PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
    static int nextInt()throws Exception{
        in.nextToken();
        return (int)in.nval;
    }

    static boolean[] r, c, a45, a135;
    static char[][] g;
    static int n;

    public static void DFS(int i, int j, int cnt){
        if(i==n&&cnt==0){
           for(int x=0; x<n; x++){
               for(int y=0; y<n; y++)
                out.print(g[x][y]);
            out.println("");
           }
           out.println("");
           return; 
        }
        if(i==n) return;
        g[i][j] = '.';
        DFS((j+1)%n==0?i+1:i, (j+1)%n, cnt);
        if(!r[i]&&!c[j]&&!a45[j-i+n]&&!a135[i+j]){
            r[i] = true;
            c[j] = true;
            a45[j-i+n] = true;
            a135[j+i] = true;
            g[i][j] = 'Q';
            DFS((j+1)%n==0?i+1:i, (j+1)%n, cnt-1);
            r[i] = false;
            c[j] = false;
            a45[j-i+n] = false;
            a135[j+i] = false;
        }
    }

    public static void main(String[] args)throws Exception{
        n = nextInt();
        r = new boolean[n];
        c = new boolean[n];
        a45 = new boolean[2*n];
        a135 = new boolean[2*n];
        g = new char[n][n];
        DFS(0, 0, n);
        out.close();
    }

}