class Application {
    private static void whitespace(int count) {
        StringBuilder sb = new StringBuilder();
        while (count-- > 0)
            sb.append(' ');
        System.out.print(sb.toString());
    }
 
    private static void print(int count) {
        whitespace(count);
        System.out.print('w');
    }
 
    public static void main(String[] args) {
        final int space = 10;
        for (int i = 0; i < space; i++) {
            print(i / 2);
            print(space - i);
            print(i);
            print(space - i);
            System.out.println();
        }
    }
}
 

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