题解 | #牛牛的字符矩形#

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        char zf = scanner.next().charAt(0);
        for(int i = 1; i <= 3; i++) {
            for(int j = 1; j <= 3; j++) {
                System.out.print(zf);
            }
            System.out.println();
        }
    }
}