@Test
    public void test3() {
    	System.err.println("test3");
        // a܂܂邩
        assertThat(sample.toString(), containsString("a"));

        // b܂c܂܂邩
        assertThat(sample.toString(), either(containsString("b")).or(containsString("c")));

        // acƂɊ܂܂邩
        assertThat(sample.toString(), both(containsString("a")).and(containsString("c")));
    }