class A {
    public static void main(String[] arg) {
        int a = 100;
        int b = 200;
        String s = "aaa";
        System.out.println(s + a + b);
        System.out.println(s + a * b);
        System.out.println(s + (a + b));
        System.out.println(a + b + s);
    }
}